You can get a scholarship for studying MBBS but first, you have to qualify NEET exam on your own and get a seat.
It is compulsory to fill the PMSSS application form, do your document verification and participate in online counseling
This goes the same for other medical courses like BDS, BAMS, BHMS where a national level exam is required to get admission.
You don't have to participate in choice filling rather you have to fill in the details and the proof of admission in the medical college. ( Condition: You should be in the final merit list of pmsss )
Check the official Notice by AICTE for scholarship under Medical Stream
You can check other courses offered under pmsss from here