You can simply let your customers use Bitcoin and other cryptocurrency as a mode of payment of your artworks. It is a common thing nowadays and I've seen a lot of users in here from different countries whom do the same thing. But there is a big problem in establishing such businesses as it usually requires a huge trust and reputation first before having a growing business with a trusted customers as well. The problem when starting that kind of business is that you either send the artwork first or he sends his money first.