A lot of users, including me, use Ezskin 2 by SnarlyGribbly available at his web site or RDNA and the good news it is free.  It will apply SSS to the skin material and you have control over lots of other attributes.  It does not affect lighting but as lighting has changed so much over the last few versions of Poser most older scripts will be of little use.

Best advice I can give on lighting is have a good read of the forum as there is a lot of good info here and not every one uses light sets but build their own lights to suit their needs.  Also, if you are using gamma correction you will need less lights and probably need reduce the strength so once again a lot of old light sets will be of limited use.

 

 

Edit - sorry cross post with both Tenyon and hborre.  I agree there is a lot to learn and the advice they have given is a great starting point. 

 

 

 

I use Poser 13 on Windows 11 - For Scene set up I use a Geekcom A5 -  Ryzen 9 5900HX, with 64 gig ram and 3 TB  storage, mini PC with final rendering done on normal sized desktop using an AMD Ryzen Threadipper 1950X CPU, Corsair Hydro H100i CPU cooler, 3XS EVGA GTX 1080i SC with 11g Ram, 4 X 16gig Corsair DDR4 Ram and a Corsair RM 100 PSU .   The desktop is in a remote location with rendering done via Queue Manager which gives me a clearer desktop and quieter computer room.