Step 1: Install proxmox

Step 2: run the post install script here, disable anything enterprise, test or related to high availability.

Step 3: check out the other scripts on the link. I suggest starting with a pi hole and experimenting from there.

https://community-scripts.github.io/ProxmoxVE/

I’ve been daily driving Linux since the early 00s and docker confounds me too, especially the networking. I’m not familiar with bottles. I just play all my games on steam and it’s seamless.