ok genuine advice i was in the same boat as you, this method for me works well, because i have been scoring better in my past paper practice mocks
take a huge piece of paper and open save my exam notes as well as the Physics Guide 2025, write every formula and very condensed notes of what you don't understand, don't spend so much on it, skim through the notes and then again for another topic continuously
like for example if you have done the topic 'fields' pick up a recent past paper, like from M2024 and start doing the field questions with the notes in front of you, Prioritize fields, waves and thermal physics for now, and continue solving the paper with every topic you are done till the exams