TL:DR; it worked!
Main story: I decided to do it in my Spanish class (risky, I know), I plan on doing it for some friends too and helping them get it unblocked. Finally I can use Linux!
that’s pretty much the same thing as what i’m doing but much simpler, the school pays for the SIM/cellular data my chromebook has so it won’t download updates automatically since the wifi/data is pay to use