Hey there! I think you got ithe idea right, but I'd say you could focus a lot more on describing the geometric forms with cross contour lines and thinking about every single shape you draw as some form of modified cylinder/box/sphere etc. And don't even worry about texturing. I happened to procrastinate on my own assignment so here's a drawing of what I mean :D But I think you're already doing well on thinking about it as general geometric shapes; just push it more to the limit!