According to experts 18, Mar 2021- Shift 1 was Moderately Easy and Your Overall Percentile can be 82.89 - 86.01.

If you are from UR then obviously you should go for the further sessions of JEE MAINS in order to have a chance in NIT's.

You can visit the link below for JEE MAINS rank predictor:

You can visit the link below for JEE MAINS college predictor:

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

You can visit the link below for JEE MAINS Marks vs Ranks vs Percentile:

https://engineering.careers360.com/articles/jee-main-marks-vs-percentile

I hope this answer helps. All the very best for your future endeavors!