Hello Monika, Greetings!

First of all don't get demotivated. There is still a while for JEE Main. So, I would suggest you to focus on basics. Also practice a lot of previous year papers or rather I would suggest you to by heart them.

If you are finding it really difficult then start from NCERT and make your base strong.

Also, keep yourself socially active. This will actually help you a lot.

Also, never forget than IITs/NITs is not end of life and there many still great opportunities left in your life.

Thank you, best of luck.