It may seem unbelievable, but by default, Google Shopping does not allow you to manage multiple websites (e-commerce stores) under one account. You have to request it here and wait a few days. After that, your account will be upgraded and you will be able to manage multiple e-commerce stores.
I have founded a new “mini-shop”, or as we call it in ExitShop, a “one-page e-shop”, this time focused on Arduino and accessories - it’s called Bastlíme.eu.
For now, it’s only about t-shirts that I spray through a hand-cut stencil or paint. The eshop with only a few products is located at truehipster.cz. After years of programming eshops, I want to try running and operating one myself. I’m quite enjoying the whole process from design to production, ironing (fortunately, I have an assistant for that), photography, and presentation on the eshop.