What does it take to develop as a writer, artist, filmmaker, activist, programmer, blogger, teacher, chef, athlete, landscape gardener, leader and manager, academic?
Whatever else you do, you’re going to need a body of work.
My two favourite children (those would be mine – simultaneously the best and most annoying children I know) love to draw. And they’re getting better at it.
This is how:

They draw pretty often, and they draw a lot. Then they draw again.
They’re far from artistic geniuses, but they have this at least in common with Da Vinci (7,000+ pages of notebooks) and Picasso (something like 50,000 artworks, of which we remember a few).