on the more technical side, for x86, chromebooks have a special UEFI firmware that only makes it possible to boot chromeos, and so the first step is to replace it with the firmware distributed by MrChromebox, which makes it work similarly to a regular laptop.
but, MrChromebox does not have firmware for ARM chromebooks, so replacing the OS may not be that “easy” in your case. if you don’t find a way, it’s best to treat it as an untrusted device, and follow what I have written in my other comment
at that point we could just flip the switch for the case insensitive mode