Download the Zip file here:
https://drive.google.com/file/d/1DEc_...
The Zip file contains the files used in the tutorial's demonstration. To follow the tutorial, use the provided JPG file inside the demo folder.
The Zip file contains a layered Illustrator file of the finished artwork shown in the demo. I recommend opening it in Illustrator and using the Layers window to explore the layers, see how they have been named, and see how the illustration has been organized.