Is there better documentation on setting up blogsmu?

I have it setup mostly but I am not sure what to do next. I would like to set it up to where business owners can use our system to build their own site. I have never built a site like this so honestly I'm lost. Is there anyone that can point me in the right direction so the client can start picking a theme ect so they can build their own site.
I am using:
Pro Sites and Membership.

Thank you in advance.