I think the hand is fine, and normally like to see the top of the head, just so you know their brains didn't fall out
but for this close of a crop I think it works. It is a nice simple "candid" shot. Maybe something like what you would see on an authors website.
However. There is a lot of light on her sweater, almost an extreme overexposure that kind of pulls my attention away from her face.
Secondly, there is that harsh shadow from her nose, and from her chin/neck down that could be eliminated through a reflector maybe?
And the shadow from her sunglasses is a bit distracting, but hard to avoid that in what looks like was very bright conditions.