I want to get admission in the top mass communication colleges in India for electronic media or PR. What should I do? I am a PCM student.

As soon as you complete your 12th, start preparing for entrance exams conducted by different colleges and universities. Mentioned below is the list of top institutes you can get into: https://www.shiksha.com/mass-communication-media/articles/top-10-mass-communication-colleges-in-india-blogId-13552