DAZ Studio beginner help

I do quite a lot of 2D illustration work and I've had the idea that rather than find someone to pose for me or composite sketches from photos & other reference material, I could get to grips with a basic 3D package and use that, so I've downloaded DAZ Studio.

Is anyone on here fluent? I'm trying to find very basic lessons. I only want to use the software for poses, so I don't need to know how to sculpt clothing, just being able to create human forms with slightly varying appearance & give them hair (possibly - not essential.)

Are there libraries out there where you can download pre rendered forms?

Thanks.

Mike.