[1]: https://www.feynmanlectures.caltech.edu/
Feynman Lectures, to be properly understood requires one to be at least an advanced undergrad.
Most people just use it as home decor and many use it like a novel.
To properly appreciate the material, you need training in Physics. Otherwise you will be getting much less.
[1]: https://www.feynmanlectures.caltech.edu/