GrapheneOS works well. But only on pixel devices.

Atuin Magic Shell History is pretty good.

TrueNas gives you a lot of options and it isn’t too obtuse. I recommend Scale over Core. Avoid it if you only have the one drive as the os won’t share its drive with the rest of the system. Also, while you can use it with only one “storage” drive, it will complain because it uses ZFS and expects you to set up redundency across at least two drives. Might be a hassle for your form factor, but worth a look.

Unless the info is out of date (which is likely) kern.log syslog or messeges.

Have you checked the logs in /var/logs?