I'm fairly experienced with the setup and some basic tuning. I'm not a tuning pro by no means...
It's a wonderful thing to have. Nice thing is when you buy it, most vendors give you a tune of your choice. So you can work off of that, and see the changes they made to help you learn.
Go to EFILive.com and download the software and look around. It's a demo, but you can still view tuning files and play a little bit.