Just join the Pirates. The "Club" Pirates is just a place for GRc'ers to go and play together casually. The GR Rivals "Pirates" is a serious team for serious games, but only against the other GRc Rivals team.
Im confuzzled. The team you ake can compete online can it not? Against others in that league thing?
Yeah, it does. Whoever is playing for the GRcade Pirates club at the time will be pitted against another club online made up of 3-10 players. Sometimes we win, most times we lose. The Club gains ranks and wins trophys and goes up some sort of league but it really is just a place for GRcaders to meet up and play co-operatively in a casual environment. You each use your Virtual Pro in this mode (New for FIFA10, used to just be in-game teams)
For a serious team built explicitly to win and be well organised, we play the forum-run Rivals series which has nominated managers and uses in-game teams.
The two aren't mutually exclusive. You should try and be a part of both the GRc "Rivals" series and join in the Clubs matches.