"this module is only seen by administrators", this message will get disappeared once you assign view/edit permissions to other users/roles for this module. To assign permissions hover over the blue triangle on left of your module title and click on settings. This will bring you a screen from where you can assign permissions.
Also I just downloaded and installed dnn blogs module and got quite a few things as soon as I added that module on one of my pages i.e, to create new blog etc.
Try this link to download blogs module - http://www.dotnetnuke.com/Community/Extensions-Forge/Module-Blog.aspx