What does the phrase Content Management mean to you? That title just seems to be a comfortable idea, that something can manage something for you; you set the controls and, with a little adjustment every once in a while, it controls the information, the forms, the -content- for the pages that you depend on to spread the word about your particular niche!
That is what Joomla is and the free Joomla templates that are available are the ones that are what brings it all together. What you do not have the ability to intuit from the tutorials about the application and the installation of these templates, you can find in the official community forums.
The free templates are created by some of the very knowledgeable posters on the forums and the end users that have a little bit of computer languages that go a long way toward helping you to get the right look and feel for your web site or blog. It is a Win – Win!