Your wiki needs to have a start page. As long as it doesn't exist, this link will be red: start.

Go on, follow that link and create the page. If you need help with using the syntax you can always refer to the syntax page.

You might also want to use a sidebar. To create it, just edit the sidebar page. Everything in that page will be shown in a margin column on the side. Read our FAQ on sidebars to learn more.

Please be aware that not all templates support sidebars.