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!