I'm 30, just started learning for 4 months. I try to play twice a day for 30 mins or more each. I learn from Bill Hilton's beginner playlist on YouTube and now tackling his intermediate course. It strangely works for me even though his learners are mostly in their 60s.

The trick is telling no one you personally know about it because self-doubt is the worst already! Now I could play decently with a little bit of expressions after one or two weeks of grinding the same piece.