MarketPress – Need Real Basic Help

I’m a newbie. I’ve got a wordpress site with BlueHost. I’ve also got a Photocrati theme. (Don’t know if this info is important).
I’m trying to set up the lite version of MarketPress. I’ve got it installed, but haven’t got a clue where to even begin.
There is no manual. There aren’t instructions anywhere I can find.
I need the 1st step. Now that it’s installed, what do I do next?

Thanks