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.
When using tables in articles, consider using class="wikitable" at the top of the table, like so: {| class="wikitable". This puts a grey border around all the cells, gives heading cells a grey tint, and uses many other common formatting settings without having to spell them all out.
Here are additional resources suitable for new as well as expert contributors: