Neither had he, but it wasn't too hard to visualize. Especially if you thought about the leaf like a balloon and could envision the wind as an extension of yourself.
Mingmo had a vivid imagination, and found it wasn't hard to put himself into the mindset of at all. He really, truly, loved a simple, straightforward power. The more complicated ones were incredibly interesting, but things like the elements? Humanity spent so much time daydreaming of being able to wield them, and he was no different.
So he plucked a properly sized leaf and let it just in front of his own space as his eyes decolored again. A little puff of air, right in her direction. Gentle, gentle start.