The approach I took in my own guide to learning Emacs was to mention
those terms (like "C-x", "buffer", "frame", etc.) as if the reader
already knew them, but hyperlinked to a glossary.
The most important part of Sacha's diagram is the bottom left corner:
"Learn how to learn more". Every Emacs expert will tell you about
"C-h k" and "C-h f" etc, but few novices actually understand how much
you should be using those self-documenting features. My guide focuses
on this, for those with the patience to work through it. :-)