Like many camera buffs, I’ve done a fair amount of street photography, stalking subjects in markets, parks and tourist areas. Unfortunately, I often come away with little to show for it. That’s particularly frustrating, because I live in Paris on a beautiful street with endlessly interesting subjects and settings. My challenges with the genre — poor ideas, a fear of confrontation and technical challenges — certainly apply to other types of photography. However, they’re magnified on the streets, due to the improvisational nature and factors out of my control, like subjects, lighting conditions and weather. To get better at this most difficult genre, I enlisted Valérie Jardin, a practicing street photographer who has taught the skill to many others in her workshops across Europe and the US. She has strong ideas about how to shoot (spoiler: it’s about storytelling) and loves conveying her passion to others. “What’s so attractive about street photography is knowing that you have a shot that nobody else has, and that nobody else ever will — that to me is beautiful,” she said. We met in Caen, in the famous Normandy region of...