What Truman said. Shoes should be fitted before purchasing. I ride almost exlcusively in spd sandals and get them via mailorder. Sheldon Brown lived in his Shimano sandals.

riding with clipless pedals is learning a habit. You will probably have some exciting moments at first. Everyone does. You quickly forget that your foot needs to unclip and the fun begins. The time involved to learn is short. Do it where you can fall over, safely. I had to put the plain old pedals back on my bike for short time. I would instinctively attempt to unclip my right foot when approaching a stop. That was as funny to me as learning to ride clipless in the first place.