Pick a simple goal or idea for your AddOn. It's often a good idea to just make an AddOn that only opens a window or prints a message to get started, especially when everything is new for you. After that works the way it should, and you have learned everything necessary to make an AddOn work at all, you can move on to adding one piece at a time toward your goals. Writting software in general is often a never ending process because you can always think of something new to add or improve.
Before I go ahead and settled this debate for good; I spent most hours surfing the .net to get an idea of what others were saying; if you have done the same you will probably find similar results ~ that in the general publics eyes, WoW Dugi Guide vs  WoW Zygor Guides is pretty much even.  U also probably found that a few opinions were biased towards the guide they owned.  These findings aren’t very helpful in finding an outright winner however; they help show the fact that with what ever guide you end up choosing zygor and dugi guides, you will should be very satisfied!