What is the most logical next event?

How to the mesh tool in adobe illustrator
Select different swatches of blue for the mesh cloud.
You can follow some combinations of blue on the illustration below.
Using the third blue from your swatch box (or any blue, for that matter), create a graphic cloud.
Create the cloud by using the ellipse tool and by placing different sizes of circles on top of each other. From your pathfinder's tool (or box) click unite to merge the circles together.