|*Hello from Sid and the Critique Club*
A pleasing portrait that meets the challenge well.
Thank you for your quirky and helpful notes, you have correctly identified the technical aspects of your shot that would benefit from altered settings, ie., aperture priority and lower ISO etc., Having said that the end result is not significantly affected and is still a pleasing result that needs little improvement
Your composition is good with empty space for the camera to look into, the background is neutral without any distractions and the generally high key effect is complimentary to the white hair of your subject. To be honest apart from the altered settings there's not a lot else to add, well done, Sid