Kudos, you did impressive work with the facial features and skin tones. I especially love the work on the eyes, eyebrows and mouths. They can be hard to get looking right but you nailed them. Also the Robert De Niro mole was a nice touch

Don't sweat the brush work too much.

Brush work smoothing can be refined and eliminated over time. You mastered the hard part of painting the details

Zoomed in like this with such bright lighting is always tough and in some ways does not really represent what it looks like in person. I always find things in my own stuff that I thought looked near perfect in person with normal lighting, but then find lumpy or rough surfaces when zoomed in

For me it's like turning the bright bar/pub lights on at 2 AM