Hello dear aspirant.

If you are targeting JEE mains then you should know about it very well. My dear it's really a very tough and competitive exam if you study hard you can secure a good rank in it as a result of which you will easily get admission in any good nit or iiits or gfti and after JEE mains if you clear JEE advanced you can get iits also. So just focus on your studies not to worry much JEE mains form is sufficient. You can fill your state level form if you want some backup plans..

Ok good luck