Stuff could be anything, digital or physical, but the idea is of discussing and doing it as a hobby without any pressure or push to make it a business or side-gig. Nothing against that, simply that communities/groups with that atmosphere are easy enough to find as-is.
Well, on my subscriptions list, I’ve got:
3D printing: [email protected]
AI-generated images: [email protected]
PC Building: [email protected]
Home Automation: [email protected]
Searching lemmyverse.net’s community search for “maker” turns up a fair number of hits that might be interesting to you:
https://lemmyverse.net/communities?query=maker