It's always a good idea to jump on free installation for fiber. It adds value to your home. It also gives you bargaining power when ATT raises the rates. You can call Spectrum and play ATT against each other.
As others mentioned in comments ONT connection is what you want.
Old article, but still relevant for ONT explanation: https://www.groundedreason.com/use-router-fios-internet/
vhd to iso converter. Never used them, but I heard that's one way to get a VM to ISO installer.
It doesn't matter which network you put iDRAC on, public or private. It's your choice. You can have it on your main subnet and access the iDRAC like you would on any other device on your network.
OOB is a precautionary configuration only. Of course, you wouldn't want to expose iDRAC to the Internet.
Set the iDRAC by enabling it, setting the password, IP, subnet and gateway. Then use a browser to connect and interact with the server as if you had a keyboard, mouse (gasp) and video screen connected to it.
Had to set it up on my WINDOWS pc, what a pain
Did you give TrueNAS Scale a spin?
This should be a pinned post for Homelab for others who are looking to pickup Enterprise servers for home use.
People do not realize the power consumption, cooling requirements and the noise levels enterprise servers take to run.