Dear Aspirant
you have not mentioned your rank so it's difficult to predict a exact rank. But because you have ST category your chances of some Nit, IIIT ,Gfti are there but these also depends on cutoff and cutoff changes every year.according to your jee main percentile your CRL rank is around 398970 - 448500. You choose some more college
And for verification your rank you can use rank predictor link in below
JEE Main Rank Predictor - Know your expected IIT JEE Main 2021 Rank by ...
You can go for some more college prediction if want you can use college predictor tool which help out find to your college link in below
https://engineering.careers360.com/jee-main-college-predictor?icn=QnA&ici=qna_answer
I hope it will help you
Thank you
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