not too bad, you've got the volume in some areas pretty decently set but it really looks like you've not used references for the actual detail areas (eyes, nose, mouth, ears etc). As such it is really ambiguous as to the sex it is supposed to represent.
If you have the time you'll surprise yourself on how much you will pick up on doing a new version using reference images. It's all about learning and the more times you do something the more you will pick up and learn new things
As one of the previous posts suggests, follow some of the head tutorials that you can find online. It'll get you thinking about the edgeloops (lines following the geometry of the underlying muscles in the face) and will help you learn more.

Si