dude im a newbie whats that mean!!!!!?????
I'll take that as a "no".
yum needs to know where to find the REPOsitory which you need to get the packages from. To do this, it needs the URL of the repository. It takes the form of a base URL and extensions (the extensions say exactly where the particular package is).
Not finding a baseurl may mean that the repo is not installed, or it could mean that the url is no longer valid.
So you need to check that the required repo is installed and enabled. (Perhaps you missed that step in the perfect setup?)
If all else fails, the repos are described in various directories off /etc ... such as /etc/repos.d or /etc/yum.repos.d and suchlike.
If you are new to fedora, you should consider:
... my personal advise is to learn about what you want to do instead of trying to follow someone elses idea of the perfect setup.