Build Dimples

I need a way to take a suface and add inward dimples and depressions. Let say I have a golf ball and the ball is cut in half, and I want to add depressions that are all the same size evenly across the extruded arc. What steps can I take to achieve this in SW. I am a student, so a walk thru would really help in understanding the process. My email is below, if anyone can help.

Joseph.cawood@wallawalla.edu

SolidworksGeneral