
i’d recommend musictheory.net! its a good start to begin learning notes on sheet music and memorizing where notes are. personally, i dont know how to translate guitar notes to sheet music mentally yet because i usually just use guitar tabs, but using that site to help with choir sight reading was a big help!
i dont know much about music theory at ALL i need to learn more too. but im probably gonna look into youtube videos for that. more chords, theres probably more internet things for that. i learn new chords by just finding songs i want to play and sometimes they have new or complex chords which has really opened my knowledge on it. i also just make chords up sometimes too haha. im very loose and not mathematical when it comes to guitar unfortunately