If you want to post a FanFic or story make a new topic and post the first chapter.
Example:
Topic: My Cool FanFic Post 1: Chapter 1 Chapter 1
People would then comment on it and the topic would grow.
Example:
Topic: My Cool FanFic Post 1: Chapter 1 Chapter 1 Post 2: Comments Cool, but make it longer
Then post in chapter-by-chapter, listening to improvements along the way!
Example:
Topic: My Cool FanFic Post 1: Chapter 1 Chapter 1 Post 2: Comments Cool, but make it longer Post 3: Chapter 2 Chapter 2 Post 4: Comments Great, add more detail though!