Thanks for joining. I'm sure you'll get the opportunity to meet lots of new people. It's all just about interaction. I like the analogy of imagining Twitter as a cocktail party - and you just strolling around, drink in hand, listening to snippets of conversation here and there, and contributing where and when you can.
I've found there are so many wonderful people on Twitter. It's easy to make friends.
Feel free to leave comments here on your page and on other members' pages. A good start is to follow everyone on the T-Club list and to start sending them @replies. Let them know you're a member of the support club.