Hello, this is a new category and it's cutoff are just for 1 year so a exact prediction is very diffult but in my opinion at your rank  it looks very hard to get any Nit, IIIT may be you you have to wait till last round of Csab counseling which takes place after Jossa counseling.
You may get some gfti but they are not so good like top Nit. Apply for other states government and private colleges which accepts Jee mains marks for admission. Refer to this link to find a college based on your rank.

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

All the best.
Hope this will help you.

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