/ic/ - Artwork/Critique

I have to keep the dimensions of the canvas the same unfortunately, and I can't rotate it to do a landscape, so part of the person is going to be cut off ):

I am trying to create a character, she's a Nixie. She's supposed to resemble a frog, so I was trying to have powerful legs with scrawny calves, long frog fingers and feet, no breasts, etc.

The head on the body sketch looks off, and her face is bothering me too. Not sure if the anatomy is right, and I want to fix anything before I start on the lineart. Any tips would be welcome! Thank you