You're maybe not interested in classical guitar at all, but I've been using the first 6 studies of Sor's Opus 60 to learn to play a little. I like Bradford Werner's
approach, and I think I downloaded the first six in notation & tab for free somewhere. The reason I started with these is because the Graded Repertoire for Classical Ukulele Grade 1 has the first three studies transposed for uke, so I was curious to try them the way they were intended to be played (although, lol, I don't play them the way they're
intended to be played, I'm nowhere near competent enough yet).
I mean, there's a ton of stuff on the interwebs, you do you, I'm just sharing what I started with on the Mini II