Dear Divakar,

It is crucial that you understand all the basic concepts from the beginning of class 9 so that you don’t stumble later in the JEE preparation. 

You should be careful when selecting your coaching classes and time management is the most important factor.

As far as timetable goes it should be prepared by rather than others as only you know your strengths and weaknesses.

Concentrate in class as this will be the base and try clearing your doubts on same day. Solve all the sums and mark all the important points. Books like RD Sharma, HC Verma will be of great help. Try solving past year papers and practice sums from NCERT

All the best!