Keep with Low Lights around the roots, part and underneath, to create shadowing at the top of the head. Then use small, single highlights around the face, through to the ends of the Hair to elongate the face.
Generally Round faces have strong bone structure, so the aim is to elongate the face. Use Lighter Tones around the Hair line, from ear to ear for brightness. Paint darker Tones underneath the ears and towards the lower ends of the Hair to help lengthen the face.