I consider myself somewhat of an intermediate player. I usually play every other week at church. I know enough to learn the songs quickly however I don't know enogugh to excel. I had to stop taking lessons due to financial resons about 4 months ago. I've been trying to self study but I've been having a hard time of it. In particular focusing on an areas of improvement. I need to startup lessons soon. My question for the people in this forum. Is there a progression of musical topics to study? How do concepts build on each other?