Always wanted to learn krav maga myself…I’ve seen a few videos in the past here and there and like how some concepts are very different that other martial arts (jui jitsu/grappling on the ground, etc…). The idea is in a street fight, you need to stay standing, never fall, and expect people to randomly drill you in the head when you aren’t looking.
If you google youtube videos of fights, a LOT are ended in 1 punch when someone wasn’t looking. It looks unfair almost, but that’s probably life/live/die situations.