I did a small post with my deconstruction practice of today, I hope it helps! Here it is, it isn't much, but I hope it helps you a little. I forgot to add that you shouldn't be afraid of overlapping some figures with others, for example, the knees are simple spheres a little squeezed to from both sides, and above and below them are the cylinders for the rest of the legs. Use triangles for the feet, as you're not interested in drawing them correctly yet. And as much as small circles do help you to size where the ankles, shoulders and knees are, making them small circles won't help you figure out the correct anatomy.
Good job!