Funny, author, I thought this would be the tutorial that you would choose!
The shadow beneath her leg is a bit too large, and the shadow on her right shoulder contradicts the light reflection on the hood of the mustang, but the color tones are spot on. Nice work!

I don't see her shadow...if you look at the shadow under the bumper the light source is obvious. (From upper left). In the source pic the model is lit from upper right.

Better.

Great job, author! Especially love the cut-out shape and type work, and the background textures. Good find on the model, fits the car perfectly.

Fun concept. Howeer: Her shadow does not connect her to the car; she looks pasted on top of it. "Mustang" could be lower (too close to the top edge) and it and "Sally" could be brighter to stand out more.

very retreee O O O.... (GOOD LUCK!)