When you’re young you have an incredible advantage for starting something new: you don’t know that you can’t do it, and you have little to lose and much to gain.
When you get older, you’ll probably have more to lose. You’ll have family and financial obligations, and you’ll risk being trapped by your present circumstances. If you want to do something bold and different, start now. Don’t wait for someone to give you permission. Don’t wait for a job, or a promotion, or anything else. If you want to lead, start moving; people will follow.