Dear Aspirant

At first lots of congratulations for your results .
I .According to trends of previous years and this year's JEE MAIN cut off I am afraid to inform you that your chances of getting admission into colleges NITs and IIITs are almost negative. However You can try in state level counselling and private colleges .One thing is important that admission in SC category entirey depends upon that particular category rank , not the All India rank.
you can check previous years cut off
https://engineering.careers360.com/articles/jee-main-cutoff-for-top-nits

https://engineering.careers360.com/articles/jee-main-cutoff-for-top-iiits

check your chances here
https://engineering.careers360.com/jee-main-college-predictor?icn=QnA&ici=qna_answerDear

Best Wishes.