Hardware requirements and recommendations for Proxmox VE
Before starting installation activity, be sure your hardware at least meets PVE's minimum hardware requirements.
The official wiki provides recommended specifications for both evaluation and production scenarios (https://www.proxmox.com/en/proxmox-ve/requirements).
However, the For evaluation specifications are a bit vague and quite restrictive; they are intended for testing only. You'll find that following them will provide what one needs to become familiar with the installation process and the web-based administration interface. You may even try to run a single, minimal virtual machine and container. If your goals and objectives are more substantive, however, you're very likely to become frustrated very quickly with these specs.
The following is the configuration recommended by the Proxmox VE wiki page (https://pve.proxmox.com/wiki/Installation#Minimum_requirements.2C_for_evaluation) for very basic testing of PVE...