Join guild:1022600. We are kind of american (Though I alone and in England) We do not have 50 members, but what would you prefer, 50 lvl 10's wanting the same thing as you or 10 - 20 lvl 20+'s who are willing to help you with whatever you need, including collecting cards
The American People would be a great guild for you to join. We have 53 members, tons of subjects in our message board, really fun admins. I even give out free cards... A lot! And our faithful admin, AP_meerkat, and me sometimes, do a "Guess Mah Favorite" every month. It's an awesome guild man. Come join anytime that you like.