Hi, NEET has an eligibility criteria, soyou can first check if you are eligible:

NEET Eligibility

How to prepare?

• Go through the NCERT book. It is the most important book for board exam of class 12. All topics in the syllabus for the exam are covered in the NCERT book.
• Make a complete list of derivations, formulae, and experiments in your syllabus and keep that list it will be handy later during the exam.
• While solving a derivation, try and comprehend the logic behind the derivations. Understanding a derivation will help you derive it easily at any given time.
• Revise the all the concepts regularly.
• If you do not like the numerical part, start early! Get used to the numerical part. Solve each and every numerical in the NCERT book (both, solved and unsolved). Physics papers compulsorily have numerical so there is no escaping it!
• After you finish your syllabus, solve questions from CBSE sample papers and books in a timed environment.
• Even focus on sectional and complete mock tests.

Good Luck!