I rigged the figures for RWBY the faces were fully sculpted and use morphs for expression the way LaFemme or any other Poser figure does. Those would be the absolute deep end of Poser rigging. In season 2, episode 7 there a dance scene where all the figures are dancing. The character Pyrrha wears a long dress. That's rigged using a hybrid of bullet physics and proxy objects. Those dresses are not dynamic cloth. It's all rigged. Most important it wasn't conformed clothing. Each costume was a discrete figure. That's to save the sanity of the animators. The rigs did contain pose dial presets for common expressions and hand poses. That's also to save on animator sanity.

Now for getting started in animation and making your own figures for Poser. If your eventual goal is animation and you have a set of specific characters you'll probably want to build in the clothes. It's just easier in the long run.

To get your feet wet start off with the mannequin Andy. He's got a mostly blank face but there are a couple of morphs that five him a sort of face. You can use Poser's built in Morph Brush Tool to create expressions for the faces of Andy.The morphs in Poser don't change the UV map of a figure. They change the shape of the actual geometry. Think like your working with clay. Doing that will give you a feel for manipulating an existing mesh in Poser. No matter what, the place to start will be modifying existing figures to get the hang of how they work.