Ok.
For this jutsu, I want you to start building up your Suiton Affinity within your body. Prepare to release it through the mouth. As you will soon learn later on that many of the water jutsus require inward preparation.
Now, you know that gas has spread molecules in it that bounce off of one another? I want you to let your Suiton Chakra flow out in the same manner to create a mist to surround the entire area we are in.