Welcome !! you already seem to have an incredible grasp of things creative and mapping is just an extension of that. I am a writer and untill I tried (and tried and tried...) I didn't think I could create maps either. I find that the story suggests the "feeling" of the map and that's what I try to create when I create a map the "feeling" and that stems from creativity which you seem to have in abundance. Check out the tutorial section find a style that you like and dive in. Post your work in one of the WIP sections and ask for feedback. I think you'll find that we are a helpful bunch. Before long you'll be able to add "map-maker" to your already impressive list of talents.