I need a better introduction to understand how flow programming works, and how I might use it. Instead I see a (seemingly) complex graph which I understand represents a program, but it's not clear how this really works in relation to text programming. I could spend hours and hours digging to figure it out, but that could be a waste of time, so I won't do it.

I get text based programming. Find a way to quickly connect that experience with flow programming, and conversion rate on this site will improve.