Hello Kirti,

Jee exam highly focus on the conceptual questions and for that you need to works on your practice and concepts. To do so you need to focus on the NCERT and regular Revision of hand made notes.

First understand the theory part then do solved example after that moves to practise papers.

Physics is the one of the interesting subject which You can observe in your daily life so relate the things with outer world wihw bookish knolwdkno.

Jee covers most of the 12 syllabus as major part. So first focus on 12 part then moves to 11as you have less time left for January exam.

Topic such as electrostatic, current, Electro Magnitism, Modern physics are easy  topics of class 12 and Kinematics, Mechanics , unit and dimensions  of class 11. You can cover these to score more than 50%.

Don't forget to solve the previous year question papers of JEE mains it will help you lot.

Best of luck for your exams.