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 despite of SC category. If it was ST then there might be chance for you. One thing is very important that changes in those category seats depend upon those particular category rank not on All India rank .However You can try in state level counselling and private colleges . Like
Amity School of Engineering, Noida
Amrita Vishwa Vidyapeetham, Coimbatore
Kalinga Institute of Industrial Technology, BhubaneswarBirla Institute of Technology, Mesra
Birla Institute of Technology and Science, Pilani
Walchand College of Engineering, Sangli
Vignan's Foundation for Science Technology and Research, GunturVel Tech Rangarajan Dr Sagunthala R and D Institute of Science and Technology, Chennai

https://engineering.careers360.com/articles/jee-main-cutoff-for-top-nits
check your chances here
https://engineering.careers360.com/jee-main-college-predictor?icn=QnA&ici=qna_answer
Best Wishes.