Noob question about OVF import and PVE disk allocations (/var/tmp/) and such

I am relatively new to Proxmox though I've worked with VMWare for decades. Before I go all in on Proxmox I'm doing some hands on testing in my home lab. I have a Beelink GTR9-Pro with 128GB RAM and a 2TB NVMe drive for storage. It should be enough for me to learn the lay of the land. I've installed Proxmox, deployed a few containers, and successfully converted one vanilla Windows VM from VMware…