Well, you're certainly in the right place!
What sort of plan are you looking to follow? We have support groups for a wide variety of plans. We also have groups by age range, amount to lose, and a whole lot of other variables, so look around! Then find a spot or many, jump in, and get to posting.
"Weight Loss Support" forum is a good place to start with general questions, or look in more specific forums for guidance on certain areas (for exercise, by plan, etc).