Congratulations for passing your 12th exam,

This year due to the Covid 19 pandemic the government has decided that the  students who merely have a pass marks in boards and required cutoff for in JEE mains can join NIT. So even you have 69% you can join NIT provided you have good marks in the JEE Mains and you fall in the merit list cutoff of the requires NIT college.

You can join NIT's only by giving JEE Mains , to join IITs you need to give JEE Advanced exam..

Hope you go it.

Thank you