To solve any problem in easy way it is very important that you know basics of Physics. Try to clear your concepts and build strong fundamentals you can easily solve any problem.

Practice for physics problems try to solve MCQs for your preparation and practice. JEE Main is all about practice.

You can prepare a formula sheet for your reference.

You can go through H.C Verma for your reference as questions sometimes are directly framed from the text.

Do revise all the topics thoroughly, focus on the chapters which carries more weightage in the exam.

All the Best!!