TWRP worked second time through. Sharing for anyone else.
First time it kind of bricked it. It just boots the load screen and then goes to "your nook is off press and hold the power button to turn on" (might have been because i tried to directly boot trwp first as seen in command screenshot)
But I managed to kick it into fastboot in the brief moment while it was on the loadscreen and second flash of twrp worked.
