can I do self-study for jee ...and if yes how to do it...? how to prepare for each subject...

Hi

I hope you are doing well.

Yes. But you would have to be very smart to work it out. Let me be a little more elaborative. I am writing the answer for JEE advance.

1. You would need a few books to cover up concepts and basic problems. Get the right set of books which cover theory as well as solved Examples. Try to solve few books completely then solving a lot of books incompletely.
2. Prefer getting a correspondence material. I recommend Resonance material.
3. Set up your study hours. Minimum of 7 hours of self study is required. This is non negotiable.
4. Plan your course in such a way that you complete syllabus before October of your class XII.
5. Take help from videos on YouTube and other sources. Your concepts should be properly clear. Solve a lot of Examples.
6. Keep a mentor to motivate and guide you. He/she can be your seniour or brother or some online guru. Make sure he has some experience with IIT JEE.
7. If possible associate yourself with self study groups where you can discuss concepts weekly or biweekly.
8. Do write a test series. Be confident and give your best.

You learn concepts and build confidence. Test will break you then you relearn and become more confidence. Do this till you are ready for JEE.

You can take any test series but don't forget to write FIITJEE open test if you are serious for JEE advance.

9. Be calm, Keep your ego aside and work silently for 2 years. Your seriousness will reward you

I hope this helps.