About the legs... it looks like you've got the right idea, except that the ankle looks a bit short when you compare to the dino pic you posted. Only the toes should really touch the ground. This is the same with chickens, we think the knee is backwards, but that's only cause the the thigh is hidden. The ankle is the bit that bends back.

And on a similar note... I don't know of any dinosaurs that have wings. Looks more like a dragon to me but that's not really a criticism. Looks good.