Yes, practice unclipping with one foot. There is no need ever to unclip with both feet. In fact, if I tried t do that, I would crash, for sure. With practice, the motion of unclip, lean, put foot down is one motion and intuitive.
When I started using clipless pedals, I spent about 2 weeks riding around some neighborhoods with one foot clipped and the other leg dangling down, just resting on the pedal. Then, I felt silly when pedaling along like that, and started clipping in with both feet, but making sure I unclipped one foot way before I needed to.