According to my extensive knowledge of H. Reptilian girls rarely have a semi-human design. That's usually reserved for Lamias, Salamander Girls, and Dragon Girls.
To give you some examples of what I mean by the fact that they almost never design a semi-human form:
But if you're looking for a more human-like appearance while retaining certain reptilian features, some things to note would be:
1) Sharp teeth.
2) Instead of human hands and feet, they should have reptilian claws and legs.
3) Obviously, they must have a tail.
4) Scales on their cheeks, shoulders, waist, claws (hands), legs (feet), and tail (obviously).
5) Given their reptilian ancestry, they can't have hair, except on their head, eyebrows, and eyelashes.
Here are some other examples, although you obviously don't need to carry that many scales. But it might serve as inspiration: