To be clear my solution here is: invite people to your server.
Don't gesture at the fediverse in general and say "I think dot art is good for artists?" Interest based communities imply you should only be posting about that shared interest, which is stifling.
The people need a place to Post.
"What about dot social?" Everyone I know on twitter/bsky has a dot social account that stands empty as the plinth of Ozimandius.