Cinematography

Film and Television Institute of India
Pune, Maharashtra
South India Film Institute
Chennai, Tamil Nadu
CRAFT Film School
New Delhi, Delhi
Zee Institute of Media Arts
Mumbai, Maharashtra
Satyajit Ray Film & Television InstituteKolkata, West Bengal
Digital Academy - The Film School
Mumbai, Maharashtra
Chennai Film School
Chennai, Tamil Nadu
Government Film And Television Institute
Bengaluru, Karnataka
The Indian Institute Of Digital Art & Animation
Kolkata, West Bengal
National Institute of Film and Fine Arts
Kolkata, West Bengal
AAFT
Noida, Uttar Pradesh
Seamedu School of Pro-Expressionism
Pune, Maharashtra
Ramoji Academy of Film and Television
Hyderabad, Telangana
NEI India Film and TV Editing Institute
Mumbai, Maharashtra
Drama School New Delhi Film Institute
New Delhi, Delhi
L.V.Prasad Film & TV Academy
Chennai, Tamil Nadu
FTIH Film School
Hyderabad, Telangana.

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.

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