First of all, thank you and holy crap!
I'm a casual trumpet / keyboard player who's just picking up the guitar AGAIN after years of trying it, hating its learning curve and giving up. This time I'm trying your lesson plan and WOW is it smooth sailing compared to the experiences I've had.
I'm only in stage 3 right now but I never imagined even getting this far in my previous experiences.
As a keyboard/trumpet player who spent a lot of time in school bands over the years, I'm used to instruments with single "keyboards". The fact that a guitar has 6 strings, each one with a different tuning, felt like a monumental task of trying to memorize 6 differently-transposed keyboards before I could do much of anything. It was just daunting.
I'm doing my best to remember that the guitar is not a keyboard and I can't treat it like one. It has its own rules/tricks and you're presenting them beautifully! At the end of the day my goal is still to memorize the fretboard and be able to play the guitar like a keyboard, being able to play melodies by sightreading sheet music and to pick apart chords and play them in the inversion that makes sense in the context of the music I'm playing.
You're getting me comfortable with the instrument in these early stages, a phase I could never power through. Thank you again!