Sure... and there are huge manuals for admins and superusers.
http://www.dnnsoftware.com/community/...You can also find online help here:
http://www.dnnsoftware.com/helpGenerally, a lot of confusion for first-timers seems to come from the fact that DNN is a CMS - so, it's doing most of the work for you. You are just interacting with it through the web. I've found that once you log in with the host account, most normal activities are self explanatory.
For basic content management, a lot starts with your "Skin". The "Skin" is basically an HTML (actually an ascx) file that tells DNN the design and structure of your pages. The skin also defines "Panes" which are little zones that you will be able to add content through the site. In the site, you can add a "Page" using the "Pages" menu. Once created, your page will use a "Skin" to know how they should look and what panes will exist to hold "Modules". "Modules" are like little apps that get placed into the panes on a page. They then display content or perform tasks. The most common module is the "HTML Module", which shows text/HTML.
Putting all of that together... When you log into a DNN install as an admin, you'll see the "Pages" menu, which will allow you to add a page. When you do, it will default to using the site's default skin... Once that page is created, it will have one HTML module on it. In edit mode, you will see a little pencil icon by the HTML module, which you can use to switch the module into edit mode and then change the content on the page. You can add new modules using the "Modules" menu.