In reply to dazt2801:
Hiya mate,
Welcome to the wonderful world of climbing. We are a broad church that encompasses many variations on a theme: Indoor, top-rope, lead, winter, alpine etc etc etc
Are you still in the Army? If so your mod90 can get you plenty of discount.
I'd recommend joining a club, even if it's just meeting a few regularly at the wall. That way you can encourage each other as well as have a laugh. You will also find out about trips away. Climbers may be selling unwanted kit etc.
Good luck with it, and don't worry too much about your weight, just enjoy it.