There is a postcard in your mailbox
You gotta get over that fear of the command line, so that's all I gotta say about that
Now, while you are in your user account, open an x terminal (kterm, whatever, click something with terminal in it's name) and start typing
Do apt-get update again because your first try didn't just do the "Hit" thing. Apt now knows what is available for your installation. If you want to (believe me, you do) update your system
[root@uilleann root]# apt-get dist-upgrade
Reading Package Lists... Done
Building Dependency Tree... Done
Calculating Upgrade... Done
0 packages upgraded, 0 newly installed, 0 removed and 0 not upgraded.
You probably have a bunch of stuff to update. Answer the questions and do it.
Feel better about the command line now?
Now you can apt-get install synaptic and get a pointy-clicky thingy if your answer to the question above was "yes". If you answered no, don't dare install that