You already have a cut down version of fedora install on it.
yum is also installed on it
After you mange to find the terminal you will be cooking on gas
So in the front screen go to files then click on my documents
After its there there will be a drop down menu with an option for terminal.
After you click on that a black background window will pop up.
In that window type
sudo su-
passwd (enter what you want as the admin password)
yum upgrade
I think its best we just leave you with the orginal desktop