Hi

hope you doing well

You should first focus on your board to secure 75% or above marks then side by side you should do preparation for you JEE if possible.

For cope up with this things you should choose online courses for boards and bit for jee you should prefer offline coaching for your maintaining consistency. You can choose any tutor or local Jee level coaching institute but must check eligible teachers.

For study refernces you may consider:

• Physics: H.C. Verma, D.C. Pandey
• Chemistry: O.P. Tandon, Morrison & Boyd (Organic)
• Mathematics: R.D. Sharma, Cengage Series

Focus on understanding concepts rather than rote memorization.

Take regular mock tests (once a week) to assess your preparation and build exam stamina.

Solve JEE previous year papers to familiarize yourself with the exam pattern.

Analyze your performance to identify weak areas.

Set aside time for revision every week to reinforce what you’ve learned.

Create summary notes for quick revision before exams.

And make proper schedule as per your peferance.

Best wishes.