Ubuntu is a good operating system, so is Fedora. You should start off with Ubuntu first, then when you get experienced with Ubuntu, move to Fedora. Also, if you are downloading Fedora, I suggest that you have a fast connection, and a DVD burning capable drive as the ISO is about 2GB big the last I checked. Ubuntu is only 700MB big, so you'll still need a fast connection, but you will only need a CD.