Luck is the last ingredient, not the first.
Don't wait until you work isn't so busy to start a hobby your passionate about. Don't wait until you're perfectly energized to hammer out your project.
Barring life-threatening injury, if you want it badly enough, you can make the time and energy for it. If you're waiting for all the stars to align before setting off, you'll be stuck at the harbour.
What happens when you put in all the work and you do get a life-threatening injury?
That's what the last bit of luck is for.