How I do self-study physics?Watch
1.Get textbooks tailored for the exam board and study them.
2. Download the specification from the exam board and check what areas you need to study, although this should be covered by the textbook.
3. Get an understanding of how many papers and how the exam works.
4. Practice exam questions by downloading past papers, use mark schemes and improve.
5. Pay for and sit the exam at a test centre.
PS you may or may not need to d the practical endorsement. If you do then you have to find and pay for someone that runs the course.