Hi Pratyush,

As you gave the JEE Main exam in 17th March 2nd shift, your paper difficulty level was moderate so your percentile would be somewhere around 72.04 - 75.56. At this much percentile you will not NIT's, and you can go for state level or private engineering colleges.

Refer here for more info - JEE Main Percentile Predictor 2021- Calculate Percentile Score to Ranks here (careers360.com)

To check your chances in different colleges, you are required to use JEE Main College Predictor Tool:- https://engineering.careers360.com/jee-main-college-predictor?icn=QnA&ici=qna_answer

Feel free to ask doubts in the Comment Section.

I hope this information helps you.

Good Luck!