Note sure if it is the route I recommend. Starting with classical mechanics takes more background that needed, is likely to be more confusing that needed and to build very wrong intuitions and conceptions.
I really suggest starting with quantum itself, before spin-1/2 systems are easier to start, and photons (in my opinion), even easier (vide Sec. 2 in https://doi.org/10.1117/1.OE.61.8.081809).
So, I recommend starting from "Quantum Mechanics Theoretical Minimum" by Leonard Susskind and Art Friedman, "Six Quantum Pieces: A First Course in Quantum Physics" by Valerio Scarani or "Introduction to Quantum Information Science" by Artur Ekert (https://github.com/thosgood/qubit.guide). To dive deeper, I recommend " Lectures on Quantum Mechanics" by Berthold-Georg Englert.