Marketpress Etsy like marketplace New User creation and user website creation

Hi,
I am trying to create a Marketplace using Marketpress. but I am running into problems and I still couldn't find a solution in the community.
I need to build a Etsy like marketplace but I am stopped at the point in which I am trying to figuring out how a user can automatically create a user and his shop.
I am trying to activate it manually but it looks like is not working. when I go to the new site the website doesn't show the thme that I select and manually activate to work with this new site. I just get a simple list of the site content. How Can I have all this automatic and working properly?
Can you point me to the right documentation thanks.
Luca