hello crystal,

according to your marks, your chance to get admission in NITs are less.

you may try in NIT Sikkim, according to me, there is no chance to get admission for general with this marks in any NIT.

you should try in private college.

here you can predict your college-

https://engineering.careers360.com/jee-main-college-predictor

hope it's helpful for you.

Good Luck.