I mostly use the source editor over the visual editor, but use the latter for referencing and I use ProveIt for citations, as I'm not too good at using the templates. I joined Wikipedia to try and improve the article Gulval. I am currently creating an article on Dingle Farm Tearoom, although I am on-and-off with this.
Wikipedia has keystroke combinations that can speed up your work, like Alt+⇧ Shift+F to jump to the search box, Alt+⇧ Shift+E to edit, Alt+⇧ Shift+P to preview, Alt+⇧ Shift+S to publish your edits, and many more. Those are for Windows users. On the Mac OS, press Ctrl instead of Alt.