I happen to really like Reese Jones and his terminology. though I usually just refer to layer zero as non lucid and the rest I don't really memorise. Though his theories and ideas are really worth listening to imo, he really got me started.

Layer zero is notorious, it's as if the plot of the dream involves being lucid, yet your logical mind hasn't kicked in to allow you to think for yourself. I had one a few nights ago where my friend was saying we were in a dream, and that we should go flying. so we flew, then somehow I lost the ability to fly and was unable to regain it. Normally if I'm lucid it hits me like a brick and I feel amazing, and I'm ALWAYS able to fly.

You just gotta teach yourself to never think about lucidity passivly in your waking life.