To make a link simply hit the edit button on top of the page where you want to make a link to another wiki page (or any other page out the wiki). While inside the edit pad, look at the right-hand tool bar. It should say
Pages show all on top, and, beneath that, a list of pages, such as
Click here to get started. If you don't see the page you want to link to, click the
show all link. Place your cursor in the space where you want your link to appear, and simply click on the link (the one on the right hand tool bar) of the page you want to link to. It's that easy.
On a side note, a good way to learn Html, the language webpages are written in, is by right clicking on the page you with the stuff you want to learn. Click on view source option. Simply steal and remix the code you want...This is especially useful for learning things like java-script.