I think the different interpretations of QM are interestestimg (pilot wave, Everett's many world's, wavefunction collapse, etc.)
I majored in physics, but I still enjoy learning more and more about it as well as abstract math. Learning is a lifelong process. There are a lot of great videos on YouTube as well.
The different interpretation are interesting, and each has pros and cons. This is still a hot topic 60 years later.
Note that many of these interpretations do not add anything as soon as we confront the predictions to experimental data. I have for instance in mind pilot waves. This is why the simplest Copenhagen interpretation is commonly admitted: there is an amazing agreement with data and I insist, it is simple.