Sorry about your fall and glad there wasn't more damage. When I first began riding clipless the guy at the bike shop told me to always unclip the same foot, always start off with the same foot and make it a habit. That won't help if I'm confused about whether I'm stopping or going, so maybe add "come to a complete stop at all stop signs" until the stopping and going are perfected, along with the clipping/unclipping. Should only take a few outings and then you can do the "rolling" track stand stops that a lot of cyclists seem to do.

I like going fast down steep hills. Now I can't believe how reckless I have been! Fortunately wreck less, too, so far. I know one thing that helped was when I read a post saying to bring my knees in up against my frame, make sure my arms are loose, elbows in, while coming down, and of course hands on my brakes and use both brakes to control my speed. The knees in helped keep the frame of the bike more steady.

Cycling seems like an easy sport to make fast progress in. Best cycling advice I ever got: Just keep pedaling!

Hope your next outing helps build more self-confidence and doesn't involve skin on pavement!