I wouldn't say afraid, really. When I first started using them (SPDS briefly and then Look Keos), I recognized that there was a learning curve and that I had to exercise a bit of patience with them and with myself. The SPDS were pretty easy, but I didn't really like them. The Keos took some practice in a parking lot. When I first had my LBS install them, I practiced them in the shop while on a trainer. It seemed pretty easy to get in and out of. My first ride with them was slightly traumatic in that that the tension was set too high and I could barely clip out. There were a few tense moments, but luckily I was in a park and I did get my foot out eventually. I learned that how easy a pedal feels on the trainer may be different on the road.
After a few practice runs, I really haven't struggled with them since. Every once in a while I'll have a ride where my timing on clipping in is off, but clipping out has always been pretty intuitive. I've had one (knock on wood) fall and that was because I had unclipped the foot I normally don't unclip for a stop because of a bad hot foot and it just threw my muscle memory off.
Live with intention. Walk to the edge. Listen hard. Practice wellness. Play with abandon. Laugh. Choose with no regret. Continue to learn. Appreciate your friends. Do what you love. Live as if this is all there is.
--Mary Anne Radmacher