W E L C O M E !
Start looking through the sub forums and see which you feel apply to you, I think I spent my first month reading other posts and learning about the page, so I can understand how overwhelming it comes across.
We are all here for the same reason though, this was the first place I started openly telling people my weight. The more I spoke about it then the more I felt able to tell the people close to me, then they were supportive and let me do my own thing so that I can lose it.
Good Luck! and obviously if you have any questions or worries, then approach one of us