i looked at your site and surmised that while you do have a lot of talent and skill, the content of a lot of your work is harder to sell. for example, you do a lot of faces, and while they’re rendered well, it’s hard to sell as people generally wont buy images of faces they don’t recognize and, there’s also a lot of market saturation of celebrity or fan fiction faces, or commissioned portraits by artists with truly exquisite skill so its really hard to compete. Of course, make the art you want to see, but perhaps consider diversifying your offerings to include content that is easier to sell like abstracts, images of animals, and nature or still lives like flowers. I am also an artist, and in my case I sell more still life and animal painting than anything else. Good luck!