Hello dear,

Congrats for getting good percentile.This year total 869010 students attempted jee mains January. You can calculate your approximate rank :(100-percentile)*869010/100.

The rank will be:26,070. You haven't mentioned your category but it is difficult to say the chances of getting nits.You wont get CSE and you may get in  lower  NIT and that too with lower possibility.I hope you will be preparing well for your advanced exam. Do attempt it.Wish you luck.