I agree with Sam, Dr. Geep does make learning the fundamentals fun.  I don't know if you have checked out Acadia's tutorial list at the top of the Forum, but it is wellworth perusing once you have a grasp and understanding what Poser is all about. 

And definitely organize your content from the beginning.  It becomes a nightmare once you get started and realize that your conten is not as intuitive as you would like it.