Welcome to our world.  I would advise you start slowly and attemp the tutorial in the manual.  It will get you familiarized with the setup.  At the same time, peruse the forum for added information, tips and tutes.  But prepare for a rather steep learning curve.  When you inquire how to perform certain tasks or techniques, don't forget to let us know which Poser version you are using.  Very important, each version has a unique workflow and approach.

Again, welcome to our insane worl!