Just start it. Whatever it is that you feel would be good for you, or fun to do, but you’re dragging your feet on actually getting to it, just start it. You’re not going to be perfect at it, but start it anyway.
It might not even be the thing you do for long before it inspires you to do the thing you actually love, but you have to start it so you can find out.
Just start it. It’s going to be messy, you’re going to be rusty, and your first attempt is going to look nothing like your fantasy, but you’ll never get there if you don’t Just Start It.