Proxmox can be a bit of a bear to setup. The documentation is not very approachable for new users. It uses a lot of terms without definition which is a deadly sin of technical writing IMO. Guides for getting an Ubuntu Server VM setup vary wildly and often recommend outdated settings.

I’m totally on board with using it though. It eliminates the need to start from scratch when migrating to newer hardware.

Set up your favorite Linux server distro and then go ham on setting up docker (dockge is a great tool to introduce compose).