Regarding the clipless pedals, it sounds like you're doing well making the adjustments. Almost everyone goes through some anxiety when starting with them. I've seen several riders take a minor dump in the parking lots, usually while tooling around waiting for the ride to begin. I've also seen a few come to a cross street, forget to unclip and slowly tumble over.

The trick is to practice unclipping before you get to the point when you need to put your foot down. I always use the same foot to balance and leave the other foot clipped in when coming to a brief stop. You will get the hang of it - don't give up.