I've had the idea to try and learn how to Program 6502 Assembly for my Commodore PET, but I'm a little lost on what the best source is on learning this stuff, especially for a beginner who is yet unfamiliar with its full Architecture and Quirks!

Thus far I've tried looking at Books from the PETs Period, but those do expect quite a bit of pre-knowledge in Computing, which for me includes a tiny bit of Python and Commodore Basic...