Hello,


Its great that you are so much dedicated to you carrier of your choice.But my suggestion to you are that don't burden yourself this much from now.You should focus on what you are studying now.I would say start preparing after giving boards with these steps:

Just start with the syllabus
1. Analyse the syllabus wholly.
2. Highlight the topics which you haven't read yet, and start with them.
3. Make a routine and divide the timing for the three subjects.
4. Everything would seem to be very new to you in 11th. So start with a basic book, I would suggest for the very recommended NCERT  for physics and chemistry.
For maths, practice from R.d Sharma or RS Agarwal.
5. After completion of every chapter, you practice the DDP and study material of any good coaching or else, practice previous years question s.

For physics, i would recommend you to study and practice D.C Pandey.
For chem, ncert +RC Mukherje(physical) , I think that would be enough .

After, completing your syllabus, probably in the month of Dec, start giving me test series of a good institute.

Remember, consistency+ hard work is all what you require to crack any exam.

Goodluck