Beautiful women's heads are very difficult until one has the knack, and you did a very nice job on her indeed. You even made her moist and sparkly upping the 'glam' quotient.
Really very fashionably attractive.
As to hair, I would think in terms of planes and shapes. It helps to give it form plus it's easier to get a handle on what is happening with it -- rules of lighting and so on still apply. And you can then subdivide strategically.
Anyway, this one's a pip! Great job on a beautiful actress.
"Not a bit is wasted and the best is yet to come. . ." -- remembered from a dream