The best way to understand NarraFirma (we think) is to poke around in the example project on the NarraFirma web site. Start with the Planning section (click on the orange box that says “Planning”) and work your way through the links you see there, reading what is on each page. At the end of each page, click the Next button to move on. If you don’t understand a page, click the Help link and read the part that says “What to do here.”
NarraFirma is companion software to the book Working with Stories in Your Community or Organization. Taking a quick look at book excerpts on the workingwithstories.org web site will help you understand the method NarraFirma supports.