Greetings!
In reply to NightingalesOath (msg # 1):
Welcome! Definitely, if you have not already, read the FAQs, policies, and dive the Help about all the whiz-bang capabilities available for running games here.
Just about any system you might be interested in playing can be found here, and there are boards here for discussing Game Systems if you are really wanting that sort of technical discussion.
Are you more interested in playing or GM-img? If you want to become a Game Master, definitely explore the GM Help before setting up your first game.
If you're interested in particular game settings, check out Wanted = Players and Wanted - GMs to see what's available.
I could go on, but you should get the point by now: there's a lot of crunchy gaming goodness here - go get you some!