II like your style and the gestures on your face, great. I made your background a little more even, then the face comes into its own better. In addition, you can make your shading darker, looks more plastic. I don't have to say anything more about the width of the nose and ears. You are on the right track, many things are already good, keep it up. I hope I could help too.

Hey there! I don't have a reference for the portrait, so I don't expect to have made it look like the reference, lol. But I adjusted the proportions a bit, especially the eyes, since they were too close together. Remember that ideally, there should be a distance of about one eye's width between them. :) I also adjusted the ears because they were positioned too low, and made a few adjustments to the shape of the face... Again, I did this based on intuition since I don't know what the reference looks like, hehe. Hope this helps!