A big 'thumbs up' on this, and 'Well Done' on at least trying to get a handle on all of it. One is not required to be a working muso to want to get to grips with this, much as one doesn't have to be a pilot to make model 'planes. It's a never-ending subject, with the promise that there'll always be another page to turn. It does become fascinating, I found, once one or two of the pennies 'drop'. For my part, I entertain no hope whatever of ever being able to play even 1% of what I've learnt over the decades, but I still continue to read through stuff well above my pay-grade, and enjoy mentally fitting it all together.
Be warned: it's a slippery slope which, if you're not very careful, may, eventually, lead you down that most dangerous of rabbit holes: jazz..!