The Yada Wiki plugin for WordPress is a simple plugin that lets you link pages together in a wiki-like fashion. This is a video tutorial that shows how to get started with the Yada Wiki plugin. There are not a lot of wiki plugin options for WordPress and I created Yada Wiki because I thought there should be a totally free option.
In the video we install the plugin, create a TOC page, create a starting page for the wiki, add the starting page to the menu, show how the shortcodes work and how the widget works. I hope you find it helpful.
The plugin is available for download from the WordPress repository: https://wordpress.org/plugins/yada-wiki/. The FAQ section on the plugin page has some good information about the plugin. There is also some reference information on my site here: Plugin Overview.