Hey Antony.

See thw rank u have secured is not enough for u to bag a seat in the NITs or any other good colleges like IIITs and GFTIs for pursuing ur higher studies in the  field of ur interest under the btech courses. U should be doing good preparation for the JEE ADVANCED or opting any other state college.

I m providing u a link for ur help 

https://www.googleadservices.com/pagead/aclk?sa=L&ai=DChcSEwiHgcC_5_XhAhVBGo8KHe7vB-UYABAAGgJzYg&ae=1&ohost=www.google.com&cid=CAESEeD28DPX4aFaY4z1m7ym8Xd9&sig=AOD64_0msDb1_rxjqt9ySQzIOJQeFDQXDg&q&adurl=https://engineering.careers360.com/jee-main-college-predictor?utm_source%3Dgoogle-search%26utm_medium%3Dpaid%26utm_campaign%3Djeemain-clgpd&ved=2ahUKEwi5kbq_5_XhAhXf8HMBHRD6BBsQ0Qx6BAgQEAE

Ask if any query. Good luck