Don't fret. I took Quantum Mechanics twice in college. The first time was from a student of Dirac using his weird notation. We didn't use the textbook the instructor assigned for the course and I was lost.
The 2nd time, I took it from the same professor who taught Thermodynamics in a way I could understand it. Same for his approach to Quantum Mechanics. I did much better the 2nd time.
Granted this was all from a Chemistry point of view, so physcists might not care about chemical bonds or microtransitions in transition metals, but I did learn where those 4 quantum numbers came from in describing orbitals.