Welcome to PTS. You don't say which fandom you really like, but please join us on fanfict alley.
Fanfict Alley is the home of all things fanfic on PTS. You can find fanfict alley on the home page. On the board you'll find different threads for different fandoms. Be sure to read the first post on any of the threads you visit. On the more developed threads, you'll find useful information and some rules of the road for those threads. The first post of any thread is repeated on each page of the thread.
For Twilight fanfiction, we have several different threads since it is the most organized fandom on PTS, but there are other fandoms here, as well.
Please feel free to PM me if you have questions.