Hello To prepare for the JEE Main Exam and Board exam you can take help from the list of tips and tricks given below -

Make a fixed schedule

Make a list of books and notes and study material you want to prepare from

Make a complete sight on the syllabus for exams

mark the important topics and read them first

ask to your teachers if you get any doubt

Do prepare a list of formulas and basic concepts for quick revision

solve previous year questions for practice

stay positive and work by heart don’t waste a single minute from now

I will suggest don't go for coaching. And study for both board and the JEE through NCERT thoroughly. Practice mock tests on various sites of different coaching institutes. Practicing mock and revising mistakes through it is enough. Don't waste your parents money on coaching