How can I create a guide design like this:

 

Our Guides were made via our Pages application. The specific template for the side-bar navigation is custom but other than that, it is nothing out of the ordinary of the of a general Pages Database. You own Pages so would be able to create something like this. For information on Pages, please read these guides: 

 

Try this

 

Awesome, thank you @Jim M & @Sonya*!