Lackey is the best place to learn the game.
I am TGO on lackey, if you see me on the server just whisper to me and we can play a few games.
Most cards are legal anymore, a few have been banned or restricted but for the most part all cards are legal. Star Wars is not like magic with all of the different formats, I suppose the best description of Star Wars is that its like Vintage/Legacy in Magic. All cards are legal in the format.