🙂Hello, Firstly I recommend you buy yourself a textbook or revision guide. Make sure to buy one from the exam board themselves as the mark schemes are more likely to correlate to the words or phrases in the textbook. An alternative you can buy is CGP, they are also really good. Its better to first go through the topics in Physics you struggle with and make notes, flashcards and attempt doing those exam-style questions that are mainly found at the end of each chapter. Keep doing this until you mastered it. However don't neglect the topics you find easy, make sure to do plenty of practices for them until you mastered that as well
Another thing is that, its really better to make a mind map, list etc., for all the formulas and units that are needed for your A-Level physics and learn them.
If you find things confusing, don't hesitate to ask questions to your tutor or physics teacher. Make sure to use them as your resources as well.
When your confident with each topics, ensure that you pull off as many past papers as you can in EXAM CONDITIONS for better practice to relieve exam pressure and to start feeling more confident. If you have time give the predicted papers a go. I am pretty sure that they have variety of questions that might crop up. After completing them, you can mark them or just give them to your teacher to mark and ask them for feedback. If I were you, I will look at the questions I got wrong and redo them after finding out why I got them wrong in the first place. Also, do enquire about your past assessments and again don't hesitate while doing so.
Although I don't study Physics I hope that helps,
Good luck !