Hi there,
Hope you are doing well.
7563 rank in ST Category is very high.
You won't get admission in any NIT or IIIT but only a few branches in some GFTIs are available for you.
Following are the recommended and most probable choices:-
1) Sant Longowal Institute of Engineering and technology:-  Mechanical, ICE, Chemical, Food Technology
2) Gurukula Kangri Vishwavidyalaya:- ECE
3) Mizoram University:- ECE, IT
4) Guru Ghasidas Vishwavidyalaya:- IPE, Chemical

Hope it would help.
Thank You.