Any guide or tutorial for pro sites plugin?

Hey guys,

I just signed up at wpmu and the pro-sites plugin alone makes me feel like I have got a great deal.

I am not a technical guy so would like your help.

I have done the following and now I need some help to move forward
1. I have installed wordpress (3.4.2) manually on a new domain
2. Enabled Multisite using the instructions from this link
3. Installed Pro Sites

Now, There are many options available under pro-sites option and it looks a little overwhelming so is there any guide or video tutorial that shows on how to install and configure this further?

Also, I like this theme from themeforest. Can I use this theme for the main site (www.domain.com)? Will this theme work?