That's great! Welcome to the online multiplayer community. I do suggest playing single player for about two weeks first, though, at least before playing against other people. Note that you could come online and play comp stomps--humans v. AI; that would let you chat with other folks and give you some human teammates (more fun IMHO). It would be a good idea to try to learn about all three races and to play each one in two or three long games (so that you get to ponder the entire technology tree).
