There are some basic tutorials available here and at Daz, and there is a manual in pdf format that you can get  from the help menu in Poser.  V4 is perhaps the most complicated figure to install and get working.  Once you have it loaded in a scene and the morphs working you can save it with a new name to the figures library. Just select it and click on the + sign at the bottom. That will give you a figure with morphs to load next time you want it.

You might use one of the other figures that come with Poser for your initial learning.