I learned a lot of things using apropos-command (after I got comfortable with basic editing.) When I found myself thinking "it would be cool if emacs did X", I

I learned a lot of things using apropos-command (after I got comfortable with basic editing.) When I found myself thinking "it would be cool if emacs did X", I just tried C-h a X Ret to see if there is a function for it. Emacs also tells you to which key sequence the function is bound (if any.) Exploring Emacs that way is like browsing Wikipedia going from article from article: you don't follow a predetermined itinerary but end up learning a lot along the way.