Joomla! is all about allowing you to create a site that matches your vision. The possibilities are limitless; this sample site will just get you started.
There are a few things you should know to get you started.
First, every Joomla! site has two parts the Site (which is what your site visitors see) and the Administrator (which is where you will want to do a lot of the site management). You need to log in to the Administrator separately. There is a link to the administrator on the top menu.
You can edit articles in the Site by clicking on the edit icon. You can create a new article by clicking on the Create Article link in the top menu.
To do other things, like edit the contact form, edit the modules or change the site name you need to log in to the administrator.
Some quick tips for working in the Administrator:
Once you have your basic site you may want to install your own template (that controls the overall design of your site) and then, perhaps additional extensions.