Hello, 

According to the rank vs percentile stats your jee main rank will be around 55000-57000. If you are a home state student then you can get that nit of the state but in South all the top ranked nits are present which decreases your probability to get good branches in southern nits . You can once see cutoffs of nits by referring to the link given below. 

https://engineering.careers360.com/articles/nits-cutoff-for-top-btech-branches

All the best!!!