The simple answer is to expose generously for the dark tones.
The main problem is contrast: you want the range of tones to fall where they can be printed easily, and with control. This is going to be determined primarily by the choice of the COMBINATION of film and developer.
We often think of a film separately from it's developer, but it is how they function TOGETHER that detemines the relationship of specific tones.
My own preference for this kind of picture is a 400 speed film ( ANY Kodak, Fuji, or Ilford 400 film would be excellent ) with Xtol developer. Avoid Tri X Pro ( great film, but reduces shadow contrast, increases highlight contrast ).
Other good dvelopers for this picture include D76, FX39, Microdol, and Ilford DD-x.
You will want to avoid HC110, DK50. They are magnificent for another type of portraiture, reducing the shadow contrast and building brightness in the highlights.
have fun: do a test. it wouldn't hurt to use half the box speed of the film as a starting point.