First you need to register with Wikidot… Then join the Digital Vomit site, by using the link in the top menu bar.
Once registered with Wikidot and this site, you can simply click on edit button at the bottom of the page. This will open an editor with a toolbar pallette with options.
To create a link to a new page, use syntax: [[[new page name]]] or [[[new page name | text to display]]]. Follow the link (which should have a different color if page does not exist) and create a new page and edit it!
Although creating and editing pages is easy, there are a lot more options that allows creating powerful sites. Please visit Documentation pages to learn more.