So my student Leila just left for the East Coast--boo hoo! But she had a great parting thought. She basically said that the single most useful skill she got from her lessons related to pattern recognition--look at the music before you play; notice the phrases; notice when a phrase repeats note for note or nearly.
This is like algorithms and language learning. With playing music, people who read the music--as opposed to those who play by ear--start out reading note by note. In complex long songs this becomes daunting. But when you start reading and understanding phrase by phrase, section by section, it is much less daunting.
Watching for patterns as you go along in your learning moves you forward really well.
I've taught piano accordion for many years. I've been playing nonstop since I was nine. As a veteran alternative school teacher and teacher of different learners, I teach all ages. I especially love to work with adults who are trying to remember how to be beginners. My lessons are seriously individualized. In my home in North Oakland.