For proxmox on a VPS beware: Some hosters are using a kind of virtualization, that is more like a container instead of a VM. This means, that if you need kernel access (like changing active modules) you will fail. Proxmox probably won’t run on such a VPS.

Also: A VPS is already virtualized. Running nested VMs (some VMs on your Proxmos VM/VPS) will hurt the performance. Better stick to containers on a VPS.