Hey there, Your rank in OBC Category is 51k. You can get admission in good colleges too as you belong to OBC Category and that will be very good as some special seats are always reserved for OBC Category.

I will recommend you to check All The Colleges, That is available for You on basis of your rankings and Reservation, Then You can also check that at Our JEE MAINS COLLEGE Predictor. That will be very helpful for You. And Then You can easily compare good colleges and choose which one will be best for you.

https://engineering.careers360.com/jee-main-college-predictor?icn=QnA&ici=qna_answer

ALL THE BEST :)