If you’re looking to sell art online, there’s several websites that will allow you can do this. There’s websites that showcase amateur artwork and professional artwork. Websites such as Imagekind, Artbreak and Deviant Art, are good places to start. They get a percentage of your sale, but you usually get paid right away. Make sure you upload in a format, that can be altered to fit certain size, ie; 5×7, 8×10 etc.