Readarr was orphaned, so most people switched to using LazyLibrarian. LL is kind of difficult to work with and you'll typically see a lot of failures in the logs for various things. Instead, you could use Shelfmark which fulfills the same general purpose but is more straightforward.

For browsing/reading, most people using Calibre-Web. You can write a simple bash script to random periodic imports via calibredb. Just point the output directory of Shelfmark to the input directory for that command.