Looks good, especially for second try with acrylics. I don't mind the pale skin tone, but I would try to reduce the amount of area you're applying those upper highlights on. Just hit the tops of the cheeks, nose, and maybe a couple spots on the forehead. This will help bring out those shapes.
If you've got a steady hand you can go in with some pure white and add catch lights to the eyes. I prefer to use a brush, but you can also try dipping the tip of a toothpick in the paint and adding the dots that way.
After I get the basic shading done on the face I've been going back in with glazes of reds, blues, and purples to add another level of detail. I've been using some of the GW glazes and just further thinning them with water (you want to build up the color over several layers) or you can use regular acrylic and add some Vallejo glaze medium plus water. Use the glazes to add a little red to the cheeks, nose, and ears. Blue glazes can make a nice 5 o'clock shadow (not really necessary here since he's got a beard). And I use purples to deepen some of the shadows around the eyes and in the cheeks. You can use other colors instead (greens, browns, yellows), experiment and see how they change the look of the figure. Also keep in mind the direction of your brush stroke matters. When you're applying glazes the color will be strongest where you end your brush stroke. You can think of it as pushing color around the figure.
I put together a short step by step about painting faces with acrylics on one of my recent projects.
http://www.planetfigure.com/threads/french-dragoon-and-painting-faces-sbs.65988/
Whether you follow the early steps or not, the part on glazes is really worth trying. You can also do some glazes of your mid or darker skin tones to make him not quite so pale. Just push the paint away from the highlights so those areas remain bright but the rest gets darkened.