HI and welcome back to Poserdom!

La Femme and L'Homme BASIC versions are included for free. If you want the Pro version with anatomically correct bits and additional morphs, those are available for purchase. Details are here:

https://www.posersoftware.com/poser-free-dlc

In addition, a lot of content is included, you can find the link at the URL I just posted for those as well.

I let those who actually create content answer the questions related there, I am a pure end user I'm afraid.

As to where to post--galleries here are also filled with AI and others, but there is a dedicated Poser 13 image thread on these forums. Same situation you are with Deviantart. It really seems to me these type of images may be gone in a few years from now and we'll just do this for our own amusement and education--the pro slots for illustration will be filled by AI, methinks (saying this with several friends doing traditional arts).