No reason to be afraid. You don't have to say anything if you don't want to. In the meetings I attended, three things were read at the start of each meeting 1) the 12 steps 2) the 12 traditions and 3) the rules for that particular meeting. Sometimes the rules may ask that you don't mention specific foods.
If possible before you go find out the type of meeting it is because they range from very structured to very flowing.
But if you decide you want to speak it's very easy. Remember no matter what the compulsion/addiction, everyone is there because they are dealing or have dealt with it.
Hello my name is Breanna and I'm a ___________(compulsive eater, compulsive overeater, bulimic, anorexic, purger, binger - whatever fits).
Hi Breanna
Welcome Breanna
See nothing to be afraid of.
There is an OA section here that will give you some more insight.
http://www.3fatchicks.com/forum/over...-anonymous-61/