We'll probably break this up into pages by type of activity, such as "Edit mode" and what-not, but that's not set in stone yet.
Nothing is, really.
Let's store some Core concepts, navigation and common shortcuts, that sort of thing. Though Edit Mode is getting unwieldy so how about putting that in its own document.
We're still sorting out how to organize this but Modifiers probably deserves its own page.
Certainly, Sculpting is a whole other thing. As are Lighting and Rendering and Materials. We're also tinkering with Physics now.
Not sure where the sprinkles stuff really goes but Weight Painting (not to be mistaken for Texture Painting) is certainly a thing, together with Particles.
The Node Editor is most assuredly going to be its own dingdang thing.