The robot form looks amazing, it's a really distinct design.
However her overall anatomy needs improvement.
Her arms are a bit too long.
Usually the tip of the hand reaches a little beyond the bottom of the pocket
Both halves up and below the elbow are usually the same length.
Usually the neck slants slightly forward instead of going straight up.
Hand aren't really hard once if you learn art construction, no artist can
really go without it, I'd heavily advice looking up tutorials on that.
Despite all of that it's still a really good design.
Keep at it.