I'm moving a number of my physical machines to Proxmox virtual machines. Here are some notes on the process.
There are a number of community scripts for Proxmox located here: https://community-scripts.org/
After installing the Proxmox software, run the PVE Post Install script here: https://community-scripts.org/scripts/post-pve-install. This will set up a number of things such as the enabling the correct repositories and disabling the nag screen.
I'm going to run Pi-Hole in a LXC container via this script here: https://community-scripts.org/scripts/pihole