Hello

First of all, all the NEET  counselling is done on this given site i.e. mcc.nic.in 

The process begins with the registration in the 1st round. Once all the step has been done then the seat will be allotted. If you have not allotted  with any seat in 1st round then you can go for the 2nd round of counselling then on mop-up round respectively ( with new registration again ) 

So for every round you need to do registration with all the following steps again.

You can proceed with your counselling process as per your own capability by interest its depend upon that you are eligible for NEET pg or not.  

Thank you.