Drawing - the basics.
It's important to understand that drawing with a 3D pen is an artistic skill just like any other art. You'll need to put in a little bit of time to make what's in your mind in the real 3D world!
Making your drawing stick
We recommend starting on a piece of paper or cardboard to make sure your drawing sticks to a solid surface. You'll need a point from which to start extruding plastic. Once you have solid footing drawing is much easer.
Try printing this plane out and tracing it's outline on a piece of paper. Get your pen very close to the paper in order to make it stick!