Music theory for guitarists can either be basic, using TAB and playing by ear, or can be more advanced where you learn how to play a song as written on sheet music. I love helping my students understand how chords and scales are structured on a guitar so that they get an ‘insider’s perspective’ on how songs are written and this helps them become versatile musicians.
You can follow a more formal approach by doing exams, or you can choose an approach or style of playing that best fits your own requirements and then build the corresponding skill. I am often asked to help students create their own arrangements of popular songs so that they can perform them in a way that reflects their creative flair.