Welcome to SWTOR.
Things are about to change big time in SWTOR. Next week (June 12th 2012), transfers are starting. Soon (probably beginning of July 2012), update 1.3. This is great for you because you won't have to live through the "dead servers" phase.
If you're really new to the game, I suggest that you join one of the high populated servers
. Even with the transfers, they'll stay high populated. Their populations might even raise with the upcoming population cap increase. Those servers are filled with many great guilds.
But like the other forum member said, we need more details? Where do you live? What kind of server do you prefer? What kind of guild are you looking for?
I hope you'll have lots of fun in the game.