How do you mean, Orimono?
The Fan Writings section, along with everything on the left, is only editable by Council members so you will be unable to directly post your own stories into that section. Instead, your story should be posted to Allyssa, or one of the other Council members, and then a decision is made whether the story is suitable to be added.
I don't believe there is anything preventing you from posting your story as a post in the forum, but most people take advantage of the readers list first to show their work to the other readers.
Hopefully this has answered your question :)