Well first of all, you need to make a character so you can RP. Make a new topic, copy the layout of the character registration, then put your characters details in the post.
Then you can RP.
That is all really, if any other members can help her, please just post another reply to help this member out.
If you would like anymore info, just look around at the other embers posts, then just try and follow suite.
Hope this helped