Jeff you can edit almost any page to see how something gets done. Heck, that's how I started learning the Mediawiki language. But then I'm a developer by profession, so perhaps that gives me an advantage.
However there are several places you can go - online - to learn how to do things. There are a couple of links right at the bottom of the main page. There's a quick guide, a printable PDF based card, and even a link to the language website, which is pretty good. All these links exist in the 'Editing and Commands' section.
For example - the double brackets ( [[ ]] ) are used to link to another page within the wiki. Single brackets ( [ ] ) are used to create a hyperlink to something outside the wiki. When using a link to something inside our wiki, spelling and punctuation all count! If the link turns out red when you store it, it means the wiki can't find the article - and that usually points to a spelling error.
Also I noticed that a LOT of information appears to be hard copied from our database. That really should be avoided unless there's no other way to get it. We have a set of extensions that you can use to do this - and they're fully explained here...
RR Wiki Extensions - The RadioReference Wiki
Finally if you have some function(s) that you find are repeating time and again, you should really consider creating a template. These are powerful tools that allow for a common set of code to be called time and again, which use replaceable variables (tokens). We use them very frequently in our NY collaboration section. They are pretty well explained in the language website.
Really if you're serious about learning this language, getting the book I mentioned earlier is a good way to start. No doubt there are other reference manuals out there. Read and try to use some of the things I've mentioned. You have your own user area where you can play without letting everyone else see it.
best regards..Mike