You are well on your way to finding one of the best resources on the web for anyone interested in the swinging lifestyle.
Use the boards, to find out what first other people might have asked, for two reasons first, there are plenty of questions asked that you might have that have already been answered.. If the answers arent for your specific issue, feel free to ask the question the way YOU wish..
The second way to use the boards is to sound off about a issue or soemthing that has come up that didnt seem right or was an issue to you..
Now then, as to your dress size, people involved in this lifestyle are from petite thru Plus and above, please dont make this a concern. Be honest with anyone you speak to and things will be fine.. and YES you will run across those that only want the "barbie" types.. do not be discouraged by this, Its just like anything else, personal choice.. and trust me.. plenty of folks arent looking for Barbie.. Unless its Xmas time