As a teacher and performer I would also add:

Play with others. Finding a community of friends who accept your challenges and want to see you succeed will turbo charge your ability. Also you get live feedback and each "performance" is pressure to practice towards.

I once had a teacher ask me "you know how to get better?"

"I know, practice, practice, practice"

"No. Perform, Perform, Perform"

Even just at an open mic or a jam. Hell, my favorite open mics were in Chicago dive bars where someone was singing out of tune on 3 chords- so long as there is friends, drink, and music, you'll be just fine.