Hi Kunal!
According to previous year cutoffs and trends there is no chance for you to get into lower NITs with your SC quota.
Following are the closing rank of last round for other state candidate under sc quota.
NIT GOA: 3500-3990
NIT MEGHALAYA: 4500-5000
NIT MAGALAND: 6500-7000
NIT SIKKIM: 6000-6100
NIT ARUNACHAL PRADESH: 5500 -6000
So it is impossible for you to get into NITs, there is some chance if you belong to the above states. You can try your luck in CSAB SPECIAL COUNSELLING as there is also no chance of you to get into any IIITs.
You can follow up this Career360's article for more information on cutoffs: https://engineering.careers360.com/articles/nits-cutoff-for-top-btech-branches
Also, you can follow up this Career360's article for more information on CSAB SPECIAL COUNSELLING:
https://engineering.careers360.com/articles/csab-special-round-for-nits-iiits-and-gftis
And don't forget to check out the Career360 College Predictor to know your college admission chances based on your JEE Main Rank, Home State, Caste, Gender, etc.
https://engineering.careers360.com/jee-main-college-predictor?icn=QnA&ici=qna_answer
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