The best website I had ever seen

I discovered Second Life a week or so ago. It is truly amazing that everything there was created by many people sitting in front of their computers. The objects, buildings and terrain is amazing. I am trying to figure out where to go and what to do and I think it is very complicated. I would like to buy some land and open a virtual Art Gallery, but that is a long way off.

I just visited the website but didnot understand about that..How can you earn money from that??