So I've been playing guitar for about 2- 2 1/2 years now. Mostly it has just been covering songs and learning parts of songs that I really like. However, more recently I have been interested in learning the theory to guitar, as in how it all works, chord structures, why certain chords progressions work, etc. I was wondering if anyone could give me any kind of tips with an approach to learning these things/practicing. Thanks in advance!