Sorry for potato quality but that's all I have. So I started of by getting tracing paper and putting it on top of the original picture, (which is a postcard from a state park in Arizona were you get to go down under ground and see amazing stalagmites and such) I traced out all of the lines that seemed to stick out, so that once I start putting it on paper, I can draw it piece by piece instead of a bunch of tiny little details in one thing.