dakar

With one post you won’t get anywhere, you need to put some more effort. I have my own community, which is quite a bit more niche than yours, but by posting everyday it has been growing slowly.
Yours has lots of potential but needs more people to find it. Most people find a community from a post and people tend to look at newer posts, so you have to put something out regularly.

The linked study in the article has many of those, starting at page 20