Hey I'm kind of a newbie getting my feet wet. I've setup a plex and jellyfin server and I'm using Wireguard to access it outside of my local network. All on an old PC running debian server through docker containers. I've bought 4x6TB of hard drives to have more storage available for more things on my server and create an Immich/Nextcloud setup.
Until now, I've been running everything off of 2 drives, one boot SSD and one 2TB hard drive. I want to know, how I can setup data redundancy in my server for the 4 new drives, without having to scrap my whole server and install some NAS operating system. I am aware of ProxMox being able to do this, but do I install ProxMox as a docker container? Can the RAID Pools/Partitions ProxMox makes be visible to Plex, Jellyfin, Immich, Nextcloud if the ProxMox is in its own container? Is there a guide on how I can set this all up?

Also, I know I shouldn't be running a NAS ans a hosting server on the same device, unfortunately I don't have an alternative as of now. Thank you!