Yeah, I still use the latest readarr builds with both ebooks and audiobook, and with rreading-glasses they still work. I am also in the chaptarr discord and got access to the alpha build, which looks really promising. Still rough around the edges, though.

On the phone app you go to Library -> People -> “Add a name” at the top.

It’s always good to read the docs, but I often skip them myself :)

They have this nifty tool called pve8to9 that you could run before upgrading, to check if everything is healthy.

I have a 3 node cluster, so I usually migrate my VMs to a different node and do my maintenance then, with minimal risks.