For those that asked: I now have a web store!
Shopify sucks and wouldn't believe me when I entered my physical address, which Google and the Postal Service doesn't think exists, so no payments via Shopify for now. (This is why I have a PO box.) It looks like purchases can be made via PayPal. I plan to donate all profits (only taking out shipping and PayPal fees) to the Friends of the Hakalau National Forest Refuge. This is partly an experiment to see if I can run a web store, and partly an attempt to make myself feel better by trying to do one small good deed in a very weary world. I have no idea if this will work for overseas purchasers or at all, so I'd appreciate any feedback or news of bugs. Hell, I'll be pleased as punch if anyone buys anything at all!
I also want to say how thankful I am for this forum, which has been a great place to learn and share. I honestly feel like I'm apprenticed to all of you 🙂