I see you have lots of advice already, but I'm going to add mine.

You have just started out using Poser, and to be honest, it will be months and months, maybe years before you produce anything of that quality using Poser.  Yes, it's a huge learning curve to get beyond the basics in Poser.

And as someone else mentioned, just because the application mentioned in a gallery upload states "Poser" it doesn't mean that the whole image was done inside Poser and then uploaded.  A good percentage are post worked inside a graphic program first, and then uploaded.  The fact that it says Poser really means nothing because when you upload you are required to pick ONE application that you used in the image.

Poser is really a step process.  There are the basics such as loading a figure, adding clothing, adding a premade pose, premade lights and pressing "render".  Anyone can do that.

Set some goals of elements you want to learn: IE: shadows, lights, reflections, posing, placement, expressions........etc

Then make it your mission with each image you create to add at least one of those elements, and to pay extra attention to that single one element that you are trying to master. 

Don't overwhelm yourself by trying to learn everything at once, because you will just get frustrated.

Learn in layers. Scenes are built from a series of elements that come together as a whole.  Think of these elements as layers.

Concentrate on one element and work hard on learning that one, even though the other elements may not be up to your vision. They will be in time :)

Once you are comfortable with that one element and have a good feel and are getting decent results that you are relatively happy with, with that one element, then work hard on a second element, while still incorporating that first element into it.

For example when I was learning lights, I spend months and months making images and concentrating on nothing but my lighting. I still used relections and the material room etc, but my efforts went into working on the lighting in my scene.  As a result I'm pretty comfortable making my own lights now. No near a master, but I am adequate enough with lights that I can usually get what I want from lighting in my scene.

Once you dealve into the material room and cloth room, those are even higher learning curves because they are entirely separate "rooms" with their own dynamics.  Not too many people "master" the material room. I know of only a handful in the Poser community that I consider to be "gurus" of that room. Bagginsbill being at the top of the list. He's been studying that room for years and I don't think there is anything that he can't accomplish because he knows it inside out.

I can't wait to see your furture images and watch you grow. 

Another tip.  Never delete an image from your gallery. Use the first ones as a guage to your growth.  This time next year you'll be uploading master pieces!!

"It is good to see ourselves as others see us. Try as we may, we are never
able to know ourselves fully as we are, especially the evil side of us.
This we can do only if we are not angry with our critics but will take in good
heart whatever they might have to say." - Ghandi