I could give you a few pointers if you assure me you really want them.
I mean you did a good job, but fresh eyes allow for seeing things that we can't see ourselves because we are so close to the thing, after all those hours.
Portraits of specific people are always harder than doing a generic person, but the things that are troubling you are mostly generic. IMHO
I hope you understand what I mean.
Let me know that you would like to know what I am seeing as faults which I would keep to myself otherwise.
Because you did a great job at it and I would hate you to think I mean otherwise.
big hugs