I am once again called to praise orgzly.
The idea is simple, it keeps all your info in plain text files on device. It allows tags for whatever you need, recipes, articles, books to read, whatever you like.
Keeping it in sync with a PC is possible in several ways, I use syncthing.
It is for sure not the easiest solution, but it’s all open source, all plain text and gets the work done.
P.S. on PC I use logseq to edit my org files, but there are other options.
P.S.2 I read the question again and I had missed the part with the e-reader. I doubt my approach will help there, but I will leave the comment in case it is helpful to someone.
The process of uploading your mind is mind uploading, very creative…