Thanx Karma, I think i will do it in D and using the Mixolidian mode. However, I have a very begginers question: If I'm writing the song in D, and I want to use the Mixolidian mode, should i work with the mixolidian starting on A (since it corresponds to the Major Scale of D) or should I just work with the mixolidian starting on D?
Did I explain myself??