This probably won’t work, I wouldn’t try it.
Consider that the main value of any environment on this market is the assets themselves. However, I do appreciate the items laid out in a thoughtful manner.
If you want to sell maps or develop maps for money, you could learn to create the assets yourself or hire out yourself as a mapper for existing games and communities. I believe Garry’s Mod had this sort of thing at one point, although I don’t know how active that scene is nowadays.
I also recently saw an environmental artist produce a commissioned work for an Elden Ring lore channel. However, she makes her own assets and is established via her own YouTube channel.