Wait no more! Immich 2.0 is the first stable release. https://github.com/immich-app/immich/releases/tag/v2.1.0

My kindle only knows about library books.

I also don’t use much data and found Keepgo to work well. It has data plans that don’t expire, you just buy the data and use it until it’s gone. 10GB ($42) usually lasts me the whole year.