Take small steps. Hell, half steps if you must. Conduct experiments. Work on projects. Act first and reflect all along the way: What are you learning? About yourself? About your ideas? About new possibilities for yourself? About what you enjoy? What you don’t? What you’re great at? What you’re not so great at? How the world responds? How does this inform your next small steps?
Naming and claiming a dream is a popular trend these days. What’s far less popular is the disciplined practice of a craft — spending thousands of thankless hours getting great at something before sharing it with the world.