Okay, pants down, here is another playthrough one month later xD. As you can see, I didn't quite get as far as I planned originally. After seeing the footage, my "guitar faces" while strumming simple open chords are hillarious. Otherwise, please excuse how my B strings sounds out of tune, I have no clue why. The tuner says it is perfectly in tune, and also well intonated at the 12th fret, so I have no idea, why (especially fretting the D on the B string) sounds so out of tune. I don't think it is an accidental microbend.
Anyway, I think my focus for the next 2 or 3 month (and it was already for the last 2 or 3 weeks) will be way more on rhythm and practicing song playthroughs and way less on super lengthy guitar solos, because I realized that I was neglecting rhythm and full songs too much.