I need help with Pro-Sites.

I am attempting for 3 days to get pro-sites to work.

What I want to do should be simple.

1 - people become a member
2 - they purchase a blog
3 - they login and customize the blog after payment

That is all I need.

I have tried many configurations, and just cannot get a flow going that makes any sense for someone who is not a technical genius.

Is there a manual? Can someone walk me through it?

Please help.

Please Please Please Help