Well, for a first attempt its actually pretty good. But because poser/3D type programs are not my arena, perhaps someone else can help you more than I...
In poser select the face camera and the figure to use. Hair from the "Hair" menu on the right side of the screen is a smart prop that is configured to apply to the head. It should position itself correctly on the head but sometimes needs adjusting in Y (height) or X and Z - right / left and front back.
The hair can be tricky to see due to transparancy but if you hover the mouse pointer over and view from different sides the hair can be trimmed to ideal position.
Hair can also be under the "Figures" folder and acts as a seperate character when it is. Select "create a new figure" and poser will place it in the default pose and position. Now under the figure menu select "conform to" and select the name of the figure to use the hair.