Dont worry its very very easy, they basically have 3 parts, 1 part is a part u make up, it can be anything u want and u can also write it before the exam, i chose smoking and talked about it and did well, the other part is where they give u a card, and ur examiner may be someone like a doctor, friend, teacher, (acting ofcourse) and they will ask u questions and u have to answer them back in traditional arabic,( in the card it also tells u what u must say, just reword it. All cards are simillar too), the last part is where the examiner will basically ask u about urself and future etc.
hope i helped