I use jellyfin to host everything; movies, shows, books. It can tag matadata and id most books fairly well. But do not use it’s built in reader. I don’t know about comics though. I can then easily download whatever book to any device connected to the jellyfin server and use local software to read it.
I usually just use librera reader as it’s open source and highly customizable. But it does have it’s glitches.
I’ve found a nice home with Mint Debian edition. It has the right balance between stable and current that I prefer.