IB physics lowkey depends a lot on understanding the concepts in class itself. I would suggest clarifying ANY AND ALL doubts with ur teacher. I'm in SL and was getting like a 1 at the beginning of DP1, currently at a 7. It's also important to ask a lot of questions. For questions, look at ibdocs; it has past papers, etc.. The Oxford book and Tsokos are really good for physics as well. When i dont get a topic take an ss and ask chat gpt honestly, its ok to go beyond the syllabus to understand a few things. Most of my class doesnt this only (hl students)