Mass Communication & Media

Hi Neerham!
A specialised Diploma in Public Relations are only offered at post graduation level. You can pursue a Bachelor degree in Mass Communication as it has PR as one of the main subjects. Once you have completed your graduation, you can pursue a PG Diploma in public relations. You can find a list of top colleges in India offering public relations by clicking on this link https://www.shiksha.com/mass-communication-media/articles/top-5-colleges-offering-pr-courses-in-india-blogId-11019
To answer your second question, product manager and a Public Relations are two very different job profiles. A product manager develops products by identifying potential products; conducting market research; generating product requirements; determining specifications, production timetables, pricing, and time-integrated plans for product introduction; developing marketing strategies.
Public relations (PR) is about managing reputation of a company. You'll use all forms of media and communication to build, maintain and manage the reputation of your clients. These range from public bodies or services, to businesses and voluntary organisations. You'll communicate key messages, often using third party endorsements, to defined target audiences in order to establish and maintain goodwill and understanding between an organisation and its public.

Hi Vaishali!
To become a Journalist, You should pursue BA in Journalism or Mass Communication (BJMC/ BMM) . Pursuing B.Sc in Mass Communication will also make you a well qualified professional as B.Sc gives you a leverage to work in a research and education institute. You can even become a teacher at a Mass Communication college with B.Sc degree.
If you want to pursue the course within Kanpur city itself, then yes JIMMS is a good option. Else, there are other great colleges across India that offer mass communication at UG level https://www.shiksha.com/mass-communication-media/articles/top-10-mass-communication-colleges-in-india-blogId-13552