If your basics are clear you can easily score good marks. Through NCERT book you can make your concepts strong but lot of practice is required in the section.

You should refer previous year papers to understand the level of questions. Solve as many as MCQs for your practice specially in the topics which carries more weightage in the exam.

You can check the important topics below

Coordinate Geometry

Continuity/ Differentiability

Limits Complex No

Quadratic equation

Integral Calculus

Sequence and Series

Trigonometry

Try to increase your speed. You can solve timing test to work on it. Make sure you fully analyze mock test series to understand your weakness and try to work on it.

All the best for your preparation and exam!!