So I bought this
brand new computer for $14 but it only has a micro usb connector (which I was going to plug a keyboard into but later ended up not needing to).
I did buy a cable with usb c on one end and micro usb on the other but I also bought a 4 pack of usb c to micro usb adapters. They're fairly handy; I have a charger next to my bed and the cable has a usb c connector on its end and now I can just keep a c to micro adapter nearby and use the same cable for the kobo as well.
Now all I need is something to keep the adapter nearby so I have these in my shopping cart on amazon for the next time I buy something:
https://www.amazon.com/stores/page/B76431A1-9A3C-4539-990F-75F03B281743
(Designed in California!)