Hello nka,

You still have a good amount of time to study and prepare for the examination so that you can score well,

But for that you need to build strategy and you have to find out if you can self study, or you need to enroll in a coaching institute.

Start with the basics, finish your NCERT books as soon as possible, create notes and then go for JEE mains syllabus.

You can filter out syllabus according to the pattern of the previous year questions and then start allocating your time to different subjects with proper time table.

If you enroll in a coaching institute online/offline it can help you in your journey as teachers can guide you in the right directions and can help you in improving your weak points.

But if you keep overthinking you will end up killing time and obviously that will harm your possibilities of scoring good.

So take deep breath,then-

1. Write down how much you know,
2. Then write how much syllabus you don't know
3. Then identify your weakest subject
4. Start making a schedule of your whole journey from this date to JEE mains.
5. Divide your studies and syllabus in smaller parts so that you can start doing them day by day.
6. Get model test papers and get mock tests as much as you can so that you can practice alot of questions.

Don't overthink, keep faith in you.

I hope it helps,

Best of luck.