Try switching to night mode where it is white text on a black background and then turn the brightness in the Kobo app down. I like that much better than the black text on white.
I also installed the alkido? reader and I like the way it formats the pages better than the kobo app.
However, I don't see myself doing much reading of novels on this

. Got to try out some of the PDF manuals I have, camera etc. (dowloaded the plugin for alkido)
Larry