I literally just installed Proxmox 9 on a brand new server (Asus RS300-E12-RS4). The specs are: Intel Xeon E-2478, 32 GB DDR5 at 4400, a single Micron 7450 NVME 800gb, 2 redundant power supplies. On Proxmox i'm trying to upload my Windows Server 2019 ISO to use (old I know, it's for work.) I've never used Proxmox so I'm not familiar with what to do.