First I searched for reference photos. Then, because the paper is so thin, I sprayed it, then drew on it with a white "soufflé" pen. (I tried pencil and ballpoint, but they didn't show up.) I intentionally made Frankie and the animals proportionately a little extra big relative to the porch and door etc.
I worked on the boy first. He is my grandson, Unfortunately, the ballpoint pen ink keeps coming through the paint, and unfortunately, I only used it on Frankie, on his face, legs and neck!! :-(