Character role-play statistics are not necessary for any of the forums unless you are going to participate in a structured Play & Post Adventure that utilizes a game system.
Creating Your Character
In every story forum you will find a 'Character Topic' and it is there that you may submit your character. Just use a pre-existing write-up as a template then post. The moderator of the story will then review the character and either approve it or provide you with some constructive criticism before you jump in.
Always remember to make sure that your character suits the environment in which they will be played. We take our writing seriously despite how we may act when out of character. Some of the writers are more detailed than others, but always remembering not to get too specific with your write-up so that you have the opportunity to expand your character as they grow and the story progresses.
Introducing Your Character
Naturally people want to get their character into the story as quickly as possible but we cannot stress enough how important it is to introduce your character believably and at an appropriate time.
For example: If the current scene is taking place in a hostile environment the chances of your character strolling by are pretty slim, unless we are talking about a battle. If say the current characters are underground, being pursued by monsters this is not a good time to toss in your character since it's just too unbelievable for an unknown character to appear during a climatic moment, in fact it ruins the story.... And it's all about the story.
Also remember that the introduction of your character should match their profile as there is nothing more 'out of character' than when someone goes against their very nature to force their character into the story. If say the current scene is on a deserted island, then you'll just have to wait, unless your character is Robinson Crusoe, or their is an opening for a vessel to happen by for a specific and believable reason.