I had a bit of a journey to get things going.
Ended up going Debian (abandoned Proxmox, even tough it was awesome).
I had to manually destroy my partitions using gparted-live-1.1.0-8-i686.iso standard installers in proxomox or debian couldn’t repartition.
Ended up using this guide:
https://community.home-assistant.io/t/installing-home-assistant-using-proxmox/201835
Worked fine first pop.
I used proxmox for a while, but couldn’t run all of my integrations as they needed access to all of my RAM, I had to create VM’s under proxmox (had to carve up my RAM). I also needed particular IP / ports for specific integrations and addons to function. Doing a full restore created a headache as I tried to remap integrations and addons to new IP’s…
Proxmox got complex in this regard.
Started again with Debian, full restore, up and running in about 20 miutes from booting via the USB debian installer, including a 10 minute restore.
Followed this:
https://community.home-assistant.io/t/installing-home-assistant-supervised-on-debian-10/200253
HTH…