Comment by Curiositry

I haven’t actually tried step three yet, but:

1. Kobo ereaders are dirt cheap at thrift stores (and run Linux)

2. KOreader is simple to install (I have done this)

3. KOReader has a text editor + terminal built in, and has a setting to switch to USB-OTG mode, which should allow you to plug in a USB-C hub, and a mechanical keyboard.

Boom! Internet connected e-ink writing tablet with excellent battery life, and the best keyboard you have, for ~$5-100.