I've added content into the three editable regions. It has top, middle, and bottom areas. The top and bottom areas are for header and footer content that are shared through the pages. The middle content is for the individual page. Anything you want on just the one page should be added to the middle area.
You can't create a folder that is a dead link, but you can create a page and nest other pages other it. You'll just have to come up with content for the "folder" page. I've added a "Guides" page for reference and nested your pages under it.