What now? Haha!
First of all, welcome! I too am more of a fan of Atlantis, but I LOVE LOVE LOVE all of them and am looking forward to the SG Universe that I read about on Wikipedia.
RPGs are nice because they allow you to be who you wish to be unhindered by the confines of RL taboos and preconceived goals and aspirations; you get to be totally awesome! You'll catch on real fast. It's easy. And soon, you'll be just like the rest of us... professional nerds! KEK!
So, what now? Sit back, stew a bit, and (just like the rest of us) wait impatiently for A) a beta invite, or

the game to hit stores! Try not to get too anxious, it's a hazard I've learned about.
=)