My fiancee sells self-made art somewhat successfully for the last 9 months. I contribute by managing communication with buyers through FB Marketplace, Craigslist, and while we tried Etsy, it didn't do that well. We specifically target the mid-range market which means we price below top artists on Etsy/Instagram, but above cheap prints and generic Ikea style art.

It definitely requires a lot of physical work on her part and our spare bedroom is basically a pile of canvas, paint, plaster, and other supplies, but it has generated over $10,000 in revenue. We could optimize more and she could make prints of some of her better paintings, but she does it for fun and most of the money she uses for shopping (and I spend my share on triathlon gear!)