I found just doing it the best for me. Start with proxmox hypervisor on some old pc. Start running a bunch of services. Some documentation mentions “heres how you set it up behind a reverse proxy”. “Hmm…whats that” is pretty much how i learned it.

Then compare with people in the homelab communities who are doing differently and find out why.

I don’t think his point was the jack itself but the device around the jack. Physically and electronically.