The top item links to article 'Help:Editing'. This page is -not- for beginners.
The article: 'Help:Wikipedia' does not mention editing. It does lead to 'Help:Menu'. It offers general help.
Anyway, I had to wander around a while to find this article: 'Help:Wikipedia: The Missing Manual/Editing, creating, and maintaining articles/Editing for the first time'. This page also tries to do too much.
It seems clear that a site this size, trying to attract new and diversified editors, could afford to invest in a 'tutor-text' approach to taking on different kinds of editing tasks. Beginners could jump in at 'adding a link' or 'changing a spelling' or 'rewriting a sentence'. Each would offer them a sandbox to try out something they want to learn to do. After couple of dozen of these, they'd feel more at-home in the editing environment.