Proxmox can be as easy or as complicated as you want. I would say a couple oftutoriial videos and you should have the basics down for setting things up. I use umbrel for media not for bitcoin. For media I use jellyfin app. I mount a network drive via command line and point jellyfin to it. But the point of proxmox is so that you try different servers to find what you like before setting up exactly what you want.