This is super cute!
The structure is the most important, and you did it great.
I would make the "far" legs (both front and back) a bit higher (tiny bit) than the "close legs".
Drawing is done on a flat paper, so we do not have depth.
Therefore, we use height. Higher toward the horizon = far.
And, because you did a great job with adding brightness values, you can draw (next time) without lines.
You just use the lines for the structure, and then erase them, or go over them (it is best to draw the structure lines gently).
Anyway, this is high level. I love it. Great job!