Having tried and failed miserably with Linux tablets a number of times I don’t think they’re quite there yet
As much as Amazon suck my old Kindle has always been pretty nice to use (the OG e-ink ones not the android ones, if you’re looking at the kindle fire just look into buying a better android tablet)
There’s also the ReMarkable, I believe that also works as an e reader with the added benefit of the pencil to take notes with (worth looking into yourself I’ve never owned one)