Can you please tell me your doubt?

You can go through NCERT books for your preparation. It will help you to build your fundamentals strong. Focus on important topics and chapters. You can solve MCQs related to important topics and chapters for your practice. You can also make your short notes it will help you in revision. You can also refer previous year papers to know the level of questions and solve mock test as well to know where you stand among other competitors.

All the Best!!