Without a working internet connection, you can simulate network setups, but not the real deal.
A teen at SDF could learn much faster with people with wisdom than by themselves.
They can be guided in a much easier way.
Hint: I didn't got internet at home until very late. And, back in the daw I knew a lot in some areas,
such as drivers under GNU/Linux, adapting basic BTTV drivers and so on, but severely
lacking in others, because there was no proper information to start with.
I used LANs half a decade before connecting to the wider net. SBCs and VMs are much greater resources than I learned on. Routers are cheap, I just set up a dynalink with openwrt for $75.
No one is asking teens to set up a production kube cluster. There’s so much to learn—they’ll be fine.
People did things just fine, just took a bit longer. Thankfully kids have a lot of extra time.