For me as a hobbyist it's so hard to know what to learn and even to know what level the teacher should be.

I'm at 1200 in lichess, tried for example multiple ,,beginner friendly'' openings, like London / Kings Indian defense, but I realized that as four knights opening is the most natural for me, I should focus on the Italian, which is the closest to my natural style of play.

Also there are tactics practice, books, videos, but I get discourage when I see how fast some people are advancing (especially as I'm in my 40s).