How does one connect to objects to make layers?

Cant seem to find anyway to save or export my model?

I was finally able to understand the menu on the controllers without any other documentation than https://www.youtube.com/watch?v=IGwOmLeT9SM But in that video, and on the support site, there is no info on how to benefit from the multiplayer environment... How can I invite somebody else? And how can they register to my networked space? I love the idea of sculpting avatars...