Good and welcome to the site. I was thinking how it was well set out. The likeness is good enough to recognise them so well done a few small drawing errors easy to put right, her face is excellent his is a little out the eye or it's parts the Iris and pupil are out his head so be a little more turned to the front so a little of the other eye shape would show this then would make the eye shape match his position saying that it is a small mistake. His chin is a little big it would not have hurt if the collar had covered it. The shading on the face is very good the clothes not as good even dark very dark lines say with a graphite block may be the answer. the hair also a little dark say a darker B6 or B8 pencil. below B6 for face shading and above for shadow or hair. Excellent that you have put a little background shading between the this has helped bring out the lightness in there faces. Ok first work Very, very good practice more and more it will speed up your improvement. I hope my comments don’t offend if you wish to improve it is essential to take criticism. I have all my life and I’m not bad now. The main thing is your brave and have talent, but at the moment you need a little help.