Dear student,
If you have appeared for JEE Mains, then you would have registered for JoSaa counselling. You need to participate in JoSaa counselling to see which engineering college & course you get basis your JEE score.
These articles/ blogs may help you understand the process better:
~JoSaa Counselling: Seat Allotment, Important Dates
I have got 43% in PCM and I am OBC student can I get admission in b.tech course?
College registration ke baad fees me concession hota hai at REC Rewa