Any suggestions for an ancient Chromebook?

Have one that is managed by a school from 10 years ago and they failed to release the device.

I am a fan of alpine Linux which i think may work well on an old Chromebook.

Any suggestions/links welcome

If you still want ChromeOS, try https://chromeos.google/intl/en_au/products/chromeos-flex/

If you want to boot a Linux distribution, try https://docs.mrchromebox.tech/