@LadyFilesse A great deal has changed since Poser 3, but if you at least vaguely recall P3 then you will have some basic grounding.

Most clothing is now conforming, meaning that the clothing mesh is bone-rigged to follow the doll's movements. To tidy up any poke-through imperfections, the clothing may also have some morphs, which are pre-defined displacements of the mesh's vertices.

Some clothing will be dynamic, and Poser runs a simulation to drape/flow the cloth mesh over the doll and any other collision items (chair, floor, etc). Dynamic is becoming more popular; it gives better results.

The dynamic simulation will be done in the cloth room; that is a specialized UI with cloth sim control panels. There are other "rooms" with modified UIs to help with other tasks.

The (advanced) material room will be new to you. Your familiarity with Blender will be helpful because Poser uses a similar node system, and P11 introduced a specialized version of the Cycles render engine which can read both Poser and Cycles material nodes.

P4 introduced the Firefly render engine, which is still in use, and the new Cycles hybrid engine is called Superfly. There are also sketch and preview render engines.

If you have P11**Pro**, you can use other computers on your home network as render slaves to speed up animation rendering (or run a batch list of stills). It is 32/64bit, so you can exploit all of your RAM.

As for Pro2014 (P10 would be the contemporaneous non-Pro version) tuts, P11Pro will have all of that plus Superfly and some new rigging features and morph brush, etc. If the tuts are "What's new in Pro2014", then they will assume that you already know everything up through Pro2012/P9.

Poser 12, in feet.  

OSes:  Win7Prox64, Win7Ultx64

Silo Pro 2.5.6 64bit, Vue Infinite 2014.7, Genetica 4.0 Studio, UV Mapper Pro, UV Layout Pro, PhotoImpact X3, GIF Animator 5