If you want to excel at pickleball, cake-decorating, or playing the piano, you’ll probably sign up for a class or enlist an instructor. But what about talking? Communication is one of the cornerstones of successful personal and professional life—yet many of us never receive any formal training on how to do it well. “We copy what our parents do, and then what our teachers and friends do,” says Raele Altano, a communication coach who also dispenses tips to her social-media following.