How to Draw a Cloud

I needed to know. A cloud isn’t a solid, isn’t really a liquid or a gas; but a “visible mass of droplets or frozen crystals suspended in the atmosphere above the surface of the Earth.” How do you draw that with just an outline? Gosh. I was at a loss. This was the first video that showed up in Google.

This is not how I finally decided to draw some clouds. But Timestereo has a point nonetheless.