I'd recommend learning theory concepts removed from the guitar, at least initially. https://www.musictheory.net/lessons https://www.musictheory.net/lessons wil

I'd recommend learning theory concepts removed from the guitar, at least initially. https://www.musictheory.net/lessons https://www.musictheory.net/lessons will pretty much teach you what you'd learn in two years at university. Honestly, I find it the best resource to get up to speed on common practice period music theory.