I definitely agree about the Info documentation (I forgot to include that), but I think the tutorial is still worth doing: it covers the extreme basics using Emacs's terminology. It's hard to figure out how to do some things in Emacs via the info pages (or apropos, emacswiki, etc.) without knowing that, for example, each pane inside the Emacs window is called a "window" (Emacs calls the main window(s) "frames").
Also, it covers some conceptual things upfront, like how C-f is forward-char but M-f is forward-word, and that M-somekey is often a more abstract version of C-somekey. (Also, how to read the "C-x M-c butterfly" style keyboard shortcuts in the first place.) A lot of the things it covers ("C-x C-s is save") are pretty basic, but it tries to introduce some of Emacs's cultural/design quirks, which are probably what really trip up a lot of people.
Also, it covers some conceptual things upfront, like how C-f is forward-char but M-f is forward-word, and that M-somekey is often a more abstract version of C-somekey. (Also, how to read the "C-x M-c butterfly" style keyboard shortcuts in the first place.) A lot of the things it covers ("C-x C-s is save") are pretty basic, but it tries to introduce some of Emacs's cultural/design quirks, which are probably what really trip up a lot of people.