Hello student,

As you have mentioned that you have scored 30 percentile in jee mains. So with this percentile it is very difficult to get any good college. You can for any private college or any state government colleges. For getting good NITs you should have scored more than 90 percentile. Do not get demotivated. There are various colleges out there. You may go anywhere. Just remember that select the branch in which you are interested in. Rest the college doesn't matter when you excel in your academics.

Hope this helps.