Film & TV

A course in direction cannot be done unless you do a Bachelor's Degree in the film making and production domain. It is made clear merely a certificate course cannot make someone a good editor to claim jobs at the best places.
I shall suggest that when a good job with growing possibilities is there one has to take up the assignment because mass media jobs are the best to do when they come to you. Once the hunt starts, it takes time.
Refer the related answers:
https://ask.shiksha.com/what-parallel-courses-can-i-pursue-with-a-certificate-in-direction-for-better-career-prospects-qna-4392881
https://ask.shiksha.com/what-parallel-courses-can-i-pursue-with-an-advanced-certificate-in-direction-for-better-career-prospects-qna-4393525

Cinematography scope: Media, especially the electronics media has become quite a vast domain of learning as well as jobs today. The considerations of abroad or national are gone because the digital revolution has trespassed the boundaries.
Cinematography has not just remained restricted to films and entertainment anymore. The scope of cinematography is quite big all around. There are projects that are done on a global level and even for a certificate course, the scope remains good. As cinematography is learning the camera its direction and uses, photography -still or motion - hence the career prospects are always there. The course can work winners for those who have been searching for an opportunity to learn the nuances of cinematography work. The certificate course, however, shall be done preferably from an acknowledged and recognised the place.
Film, TV and New Media Production - Overall, there is no difference in the domains mentioned.
As a Mass Communication Expert, I shall not appreciate the submission that each of these categories mentioned is different from each other, they complement each other.

Acting and anchoring can lead to a good profile in the government sector. We have seen that there are so many awareness programmes of the government where millions of people are engaged to spread a word about the policies as well as general well-being awareness. Theatre, till date is the best method and tool to do so. Hence, acting is in demand as a skill.
The government is finding it tough to reach the world without skilled professionals who make the best of communication. Persuasive and impressive communication skills are important and even the government has been making use of the best and creative+innovative people by hiring them as public relations officers for various departments. The hiring is not just restricted to the offering by the Information and Public Relation Department. Any ministry or department that is dealing with people, has a need for someone with a course in mass communication/theatre, etc. These jobs are offered for the role of actors with the cultural wing and have ample scope for the eligible people. A course as said in the question must be one that fulfils the hiring criteria.

Documentary production/cinematography is a specialisation domain, and there may be many things that you will need to keep learning along with the production learning.
The suggestions that I can make are:
1 A degree in a popular language that could be used in your work place
2 Content writing and proof reading
3. Web development and digital marketing
4. Music and sound mixing basics/audio production
5. Advertising and public relations management
The decision depends on how much time you get free from the work of learning documentary production. When you say that you are learning the production of documentary, I take it as a comprehensive work that is itself a time-taking thing and might not allow you to venture for more.
Read the related question which gives a similar solution:
https://ask.shiksha.com/what-parallel-courses-can-i-pursue-with-a-certificate-course-in-radio-jockeying-for-better-career-prospects-qna-4393561

Acting and modelling can be done as part time studies even at advanced level. However, it is really good if you are doing it the regular way.
You need to be skilled at communication skills for sure.
Parallel courses are of three types: distance mode, online mode like MOOCs and regular courses.
It depends on what type of course you are doing already.
The parallel courses suggested are:
1 A degree in a popular language that shall be used in your works and place.
2 Content writing and proof reading.
3. Web development and digital marketing.
4. Music and sound mixing basics/audio production.
5. Advertising and public relations management.
6. Director should also learn more about management and business admin.

We're discussing this question whether public relations corporate communications are better or poor than camera editing or camera work jobs or careers.
There is an important observation regarding this that candidates who are good in communication skills, those who know how to handle situations, conflicts as well and those who know how to manage the interactions between one company and other stakeholders should go for PR field.
Corporate communication is also the same thing as Public Relations whereas camera work is a technical work in which you manage the camera, production of some documentaries or you do the photography, etc. It's a desk job which needs less communication skills and more of technical skills.
Public relations and corporate communication shall prove more growing and well-paid work profile than camera profile.

Acting as a career involves more than just performing in movies. Working actors perform in live theater productions, at theme parks, in commercials, and on television shows. There is no need of a specific degree to become an actor, but it is necessary to have certain skills and attributes that make you a good actor. You will need creativity, speaking, literacy, and reading skills, memorization, physical stamina, persistence, discipline, and dedication and ability to communicate with a wide variety of people. No formal training is required but the aspirants need to work a lot. College degree programs allow students to expand their skills in various acting fields, including acting, sketch comedy, voice work and musical theater etc. One needs to acquire a lot from these and showcase their talents. They can start their career from college productions or if possible the theatre productions. Many auditions are conducted based on which the actors are recognized.
You need to have a good accent and good communication skills so that you become attractive. Social media websites really beneficial tools for actors looking to become better known and reputable. They should also maintain a personal website where they can upload their resume, biography, etc. which would make them recognizable among the public.
The salary of a debutant depends on the role they get. If they are a major one, then they can earn INR 30k-40k per episode or shoot and if they are not a major role then they can earn INR 10k-15k per episode or shoot.

There is an answer to a related question about the courses in question: https://ask.shiksha.com/what-are-the-career-prospects-in-india-and-abroad-for-ma-in-film-television-and-new-media-production-qna-4393242
The above question has attracted three expert replies and takes us to a better understanding of what job are available after it and how can one get a job.
The aspect here is not about sharing that there are jobs in the above profile and skill sets. But the question still remains where the things are taught in real serious and responsible manner.
If the graduation has been a learning activity and there is a job coming your way through graduation, then doing a PG in distance is okay but the candidate has to work very hard; really hard on the personal+professional front.
https://ask.shiksha.com/is-it-worth-to-pursue-a-ba-in-video-editing-and-videography-from-distance-learning-in-india-and-why-qna-4392978
https://ask.shiksha.com/is-it-worth-to-pursue-a-certificate-in-audio-video-editing-from-distance-learning-in-india-and-why-qna-4392980
https://ask.shiksha.com/is-it-worth-to-pursue-a-certificate-course-in-cinematography-from-distance-learning-in-india-and-why-qna-4392983