Hey.

Here is the closing ranks for admission in NITS in the CSE branch for the SC Category. Considering this you seem to have a fair chance. You can look at the cut off for CSE in all NITS yourself using the link given below.

National Institute of Technology, Agartala 20931
National Institute of Technology, Manipur 30,826
National Institute of Technology, Meghalaya 10420
National Institute of Technology, Mizoram 10460
National Institute of Technology, Puducherry 12693
National Institute of Technology, Sikkim 70720

https://engineering.careers360.com/articles/nits-cutoff-for-btech-computer-science-engineering