Having issues in Pro Sites as to setting up the front end site for the customers

Greetings!
I went through all of the videos on setting up Pro Sites, and it seems pretty straightforward. My question is this: Where do I setup the theme for the site that my users will go to in order to login, see the offers, register, etc. My domain is http://www.smdynamix.com, I have WP installed and Multisite turned on. I have selected several options, and activated the Sign Up page option. But when I look at the site, there is nothing, and it is being treated like a user signed up. Where do I manage the site that I will promote to get sign-ups? I probably did not set that up in the correct spot, and just setup a new user site. Your help is much appreciated - I think I can handle the rest...lol.

- Matt Tyrrell