I think, your text is perfect and ready to be published. It could be the first of the 3 ways to contribute as we decided about our new team page (and that I still have to restructure, try to do it until Wednesday).
Maybe you should add some short explanations of some terms as “fork”. Something like “make a copy, so you can’t break anything published, but system keeps track of its original and can perform steps to integrate modifications into the published text”.
IMHO, that is an important topic. I said that elsewhere as well. The current presentation is very elegant, but hard to find. Maybe, we could introduce 2 buttons below the table of Contents, one with the link to edit and one to your how-to.