Every now and then a subject comes along that can be understood as a sequence of layers that progress from ,pale general statements to more specific, middle value interpretations. and on to fine dark detail. Here's an example of a subject that invites a broad treatment, placing light shapes on top of white paper, then making the middle value washes and strokes right on top of the lights, and finally, putting the darks on top of the middles. This clarity of seeing what follows what leads to confident painting.
Try a simple version of one of these images. Before you begin painting ask what comes first. Then what?