Connecting and disconnecting clipless bike shoes from Shimano pedals
You're not going to break them, and really, their advice is too complicated.
To clip in, just stomp your foot on the pedal in the right spot. If you don't get it right, try again. Pretty quickly it will become second nature.
To clip out, rotate your heel outward. That's it.
This pedal lets you set the disengagement resistance with a screw on the back if you want to make it harder/easier to clip out. You'll need to set it for both sides. And you can reposition the cleat on the shoe to get a better position, but make sure to really tighten it down—if you don't, the cleat can stay locked in the pedal and the shoe will move.