just for personal enrichment I going to do a second reading of QM. my first was 20+ years ago and found the topic interesting. my education was exclusive to position space and solving problem after problem using SWE with a bazillion different boundary conditions and Hamiltonians, my calculus is OK. that's was all great but when I see something involving mixed states, density matrices, Dirac notation, quantum logic I don't even recognise it as QM and have no clue what is being described or discussed or what problem is being solved. plan; - do a course in mathematical/symbolic logic - do a course in linear algebra - do a course in abstract algebra eg group theory - jump into Ballantine textbook is this efficient? what would educators here recommend as a learning pathway. note this is just for fun and personal enrichment as stated.