All rules must have mapping or they won’t work. Perhaps you should start out smaller with less complex tutorials. This is an advanced tutorial. Use default mapping for rules.
Most tutorials written by me or QMcKay leave out the step for rule mapping if attempting a complex tutorial it is typically understood that rules require mapping. In fact the next version 5 includes default mapping automatically.
If you don’t know the basics maybe start looking for the basics first. Read the welcome thread it is a great place to start. The downloads page has links to some good tutorials as well.
I’ll be honest when I write a tutorial I typically am not writing it for beginners.