Right now

If you have some idea what you might want to do in the future, try some version of it now. For example, if you want to be a YouTuber, but really only think of it as viable in the long-term, there’s no harm in making videos now. In other words, there’s no reason why this future can’t be at least a little bit reality now. All it would take would be a little effort on your behalf, and who knows, you may find you don’t like it. But if you do, it should inspire you to take more concrete steps to making this idea a reality.