I consider my self educated.
so best thing i can advise is:
temporary reflash your device with standard seabios based bios (you can do this back and forth)
install preferred linux, then flash back Pureboot
for flashing bios there is automated tool:
firmware / utility
coreboot utility and updater script
I work in security management (leadership), penetration testing is more of a hobby and something that I’m study for personal development. Nobody can know everything.