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!
i also disabled auto updates by using my cellular data so it cannot update automatically, instead requires manual updates!
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