IB Physics HL and SL are difficult courses. Even with the best teacher, you will likely need to spend some time studying on your own to understand the most difficult concepts covered in the course. I remember I did when I took IB Physics HL.
In this study guide, I've compiled links to all of the best free IB Physics study guides so you can easily find notes on the topic you're interested in. I organized this guide using the IB Physics syllabus.