@jules So, to clarify, you're not specifically looking for THOSE topics you listed, but similar catch-all topics? I think that's a good idea, but I'd suggest starting that catch-all topic yourself with magazine/community and then have tags be the sub-topics. You'd have more people want to join the community if it more or less covered the more niche topics within, and thereby getting more activity to follow.

Not specifically on the topics you mentioned, but still art-adjacent, so I guess I'll mention it here for anyone who might stumble across.
I've created Industrial Design and Jewelry Design magazines as places to share your work, ask for advice or discuss relevant interesting things.

@knitting, @lace