Hi Shayantika

The process of getting an admission in private colleges is exactly the same as to get an admission in a government medical college.

1. Give NEET
2. Results will be out giving your rank
3. You have to register online for counselling
4. Counselling will occur
5. Result of counselling will be published providing which college you are able to get admission
   
6. Now you have to prepare some papers and get those verified from a specific place and on a specific date mentioned in the official website
7. Then on the date of admission you have to take those papers to the college that you have got chance for admission. Then pay them as they ask you (that will be mentioned already in tge official website of that college or you can contact them and ask them about the payment)

You can opt for upgradation if you want to get admission in a better college otherwise you can stick to that college. (Note: Colleges charge an admission fee which is not refundable when you upgrade to another college and the admission fee varies for colleges)