I'm an artist (not digital).
I'd like to begin to sell my artworks by accepting bitcoin, but I don't have (and I don't want) an e-commerce.
NFTs
I was going to suggest NFTs, too... but it's a lot more of a digital thing, and the OP doesn't do digital. Having said that, if you are an artist and you're interested in crypto, then NFTs are definitely something to look into.
Basically if you just want to let people know that you accept bitcoin, then I think it's a simple two-step process:
1) Get yourself a bitcoin address. If your only aim is to accept bitcoin payments and then convert to 'normal money' rather than hold the bitcoin long-term, then setting up something like a Coinbase account might be sufficient.
2) However you advertise your art, just tell people that you also accept bitcoin. If they ask to pay in bitcoin, then tell them the price and give them your address. Or simpler than the address, the equivalent QR code.