JEE Main

where do you live? I mean in these cases , domicile helps a lot for getting a good college. You can try for dwarahaat in uttrakhand. One of my friend with the same scoreand 85% in 12th boards got that college the last year. Also it's a govt. college .

It depends on his board marks, he has 50% chances to get admission in an NIT.

What was your stream in class 12th, science or commerce?

yes you can get

The amount of time you need to give to your boards study depends upon your caliber. If you are a bright student, 2-3 hours for 12th and 6-5 hours of jee mains study would suffice. Do not study for more than 7-8 hours a day. Rest properly and take a 15 min break after every 2-3 hours of study. Now, this is possible on holidays. On school days, utilize the time in your school for the boards study like in free periods.
If you are a weak student, give 50-50 distribution to both.
Watch a movie once a week, do not cut yourself off from entertainment. Both study and entertainment is important for a healthy mind.

You should try in private colleges for the same.

You cannot get admission in any college.

use collage predicte