See how if you draw lightly you can make adjustments.

Let's draw the top of the leg shape separately. See how it almost looks like a diamond shape and it reaches about ¼ of the way down into the bottom left rectangle. It also angles off the left a bit.

Sketch that puppy in there.

The boot is a log rectangle that gets a tiny bit thinner at the bottom.

Remember this is just the shapes drawing. It's the map for the details so draw lightly.

THE ART POEM