At the risk of sounding somewhat purist in approach...as a newcomer to 3d it might be wise (if you haven't already), before tackling anything else, to take some time to grasp the the basic principles of what this medium is - what it's core elements are and how they interact with each other. These principles apply more or less to all the various 3d apps, high and low end.
I only mention this as understanding the fundamentals can save you a quite a few headaches later on as you're coming to terms with exactly what Poser is capable of and what it's idiosyncrasies are.
At the very least it might be an idea to keep a few of the following principles in mind whilst exploring Poser in these early stages.

I'm talking about things like:

• what a mesh object is (the difference between vertices and a polygons, how objects are UV mapped so that you can apply textures to them etc)
• cartesian coordinates and how they define where objects, lights and even some aspects of materials are in 3d space and how you 'translate' or move things around with confidence.
• what shaders and materials are and how they define the surface properties of objects like diffuse and specular (shine) reflectivity, bumpiness etc (very important).
• 3d lights (lights in general) and how they interact with (mesh) objects and shaders/materials  and cast shadows in renders in  order to reveal form.
• What a renderer is and the vital role it plays to interpret all of the above to give you a nice image at the end of it all.

You don't have to understand everything in all it's minute detail, but a good grasp will help I'm sure. It's easy to get sucked into playing with rigged figures and their wonderful morphs and clothes and forget the basics.

I'd suggest playing with some simple primitive objects like spheres and cubes to start, with a single infinite light with Raytraced shadows, and see how some of these basics apply in Poser.

Just a thought.

 

PoserPro2014(Sr4), Win7 x64, display units set to inches.

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