Go to > Developers and turn on Linux development environment . Open the Linux Terminal. Enable Flatpak by typing: sudo apt install flatpak

or lighter emulators that are more likely to run on your device?

If your goal is to play higher-end games at school, your best bet is using Cloud Gaming

While a Virtual Private Network (VPN) can sometimes bypass basic web filters, using a free VPN on a school Chromebook is highly discouraged: