Ghostship had released some pretty good lightsets for free here: Studio Portrait Lights for Poser 11 & Poser 11 Pro

You should also check out the official Poser forums at SM, there is a lot of good information there, and also helpful people to get you started. SM also has tutorials on Youtube. There is actually loads of P11 tutorials and freebies out there, but they don't have Daz3D's PR machine behind them ;)