Ok, just to make sure I understand.

I am saying:

"Go to your history and find the last lesson, then go to that lesson and click the button that says next."

You are saying:

"That's great, but what would be better is a way to get to the next lesson without having to click history, the last lesson, and next."

If I got that right, then I have these questions:

Where would we put that? As a button on the main page? What would we do if - for instance - you had just finished a whole song lesson and there was no particular next? No button?

Thanks for taking the time to tell us about your idea.