After my first century with the hybrid, I worked up the courage to get clipless pedals. Having my feet attached to the pedals was another scary idea, just as riding on two wheels had been, and adjusting to clipless pedals was quite an experience! The Shimano SPDs that I chose are dual-system, and the platform sides have teeth along the edges. In one fall, before I got the hang of clipping out in time for a stop, I got a nasty gash in my left leg from those teeth. Eventually I learned that I have to unclip when I still have a fair amount of momentum going.
Hanging onto a door frame while I practiced clipping in and out wore out my arms very quickly. This was some time before I began doing a bit of resistance training to build up a little core/upper body strength. In desperation I bought a CycleOps Fluid Two trainer, which cost almost as much as the bicycle had. It was worth it, though. Hooked in like that, I didn’t have to worry about falling, and could put my entire focus on what I was doing with my feet. And incidentally, having the trainer is useful when the weather is just too awful for outdoor riding.
Going clipless, then, is a big step, or so it seemed to me. It took time for me to build up my confidence in using them. Now, after more than three years of riding clipless, it's become hard to remember exactly what it was like when clipless pedals were new and scary!