Welcome to 3FC =)
You will find an enormous number of people here who understand what it's like to weigh a lot and finally get in control.
You might appreciate the 20-something's section, but there's also an area for those who began at 300+, and a 100lb Club for those who are looking to lose/have lost about 100 lbs, there's even a Chicks in Control section for those who aim to have a binge-free life from now on.
There are a ton of Chat threads that people create to chitchat and update eachother on a daily or weekly basis, don't be hesitant to join -- people on 3FC really want to include everyone.
Take your time in looking around, and participate in any section you're comfortable with. Keep in mind that you're also welcome to join in on more than one area (it's an open forum, and not everyone fits into just one section).
If you hope to have personal chats with people, I believe there's a 20-day waiting period before they can PrivateMessage you. (To stop those spammers.)
In the meantime, settle in and enjoy!