"To learn the craft" means to acquire the skills and knowledge needed to become skilled or proficient in a particular field or profession. Full definition
More and more people understand that to actually become a successful trader, you need to dedicate a significant amount of time to learn the craft in hopes of becoming profitable. (foxytrades.com)
In the past, most people learned crafts from a friend or family member. (bookpage.com)
He started teaching writing at a time when it was assumed that writers were «born» not made, and wanted to help writers with learning the craft as he had learned it. (thecreativepenn.com)