Also - here is a crop of the head and shoulders without the hand, from the full resolution picture, so you can crop, resize and use "unsharp mask" filter on it, as you see fit

I'd experiment with cropping it slightly first, then resizing - sometimes a few pixels can change the way the face in a small sized image will look, due to very low resolution of the forum portrait. If you'd like some assistance with resizing, let me know!