As in writing the OP has personally written.
Amitheasshole is the creative writing community.
@Rouxibeau does it have its own creative writers yet? last time I looked it was just syndicating creative writing from reddit.
If nothing pops up when you search for it, you can always create it yourself :P
Edit:
Here's the top 3 I found by searching "writing":
Edit: just read the description again and realized it might not be what you meant
sorry don't know how to add proper lemmy links, but this is one of them.
Let me know which one you are joining. I liked the way the short stories sibreddit was going before I left whereby they gave prompts and word limit challenges on the same days each week.
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There are several Writing and WritingPrompt communities on several servers. I can't speak to how active they are.
Where nosleep?