Then you may have choosen the wrong software.  Poser is a 3D art application which was originally developed to help artist with a virtual mannequin as opposed to an actual wooden doll.  Now it is a full fledge application for posing, constructing scenes and manipulating 3D mesh which can be rendered within Poser's render engine.  There are legacy characters provided and there are numerous 3rd party figures with morph packages available which can create a multitude of additional characters as the spin of a few dials or clicks.  But the learning curve can be steep.  What you are inquiring to accomplish can be done in Poser, but you will need specific packages and perhaps additional modelling software to create the right look.