First off,
There is a ton of advice here, and places to meet buddies. I suggest you look around...find a group or spot full of people you relate to (we have a "Depression and Weight Issues" group that is pretty lively with the posts - I believe its in the "Dieting with Obstacles" area). You might look at specific plans, and when you settle on what you'd like to try, find the area for that. All of these would be great places to start!
Anyway, welcome! Can't wait to hear more from you soon.