Alright, great description. As long as you can grasp the concept of water jutsus, then we can move on.
You do remember how the form of water, Gas, works? There are molecules that bounce off of one another, the natural state of Gas.
Let's have this same concept apply to this jutsu. Work up Suiton chakra in your body, then release it in a "spreaded manner" throughout the air. Add enough Suiton chakra to make the water become dense and turn into a mist surrounding us.