Creating Online Directory

For the record, I am very NEW to wordpress, so please be gentle

I purchased the directory plugin with the hope of getting an online directory site from it. I downloaded the dashboard but these does not seem to be working, I am surpose to feed the API key but cant find the page to do these, I have no clue on how to transform my wordpress.com blog to an online directory (which is what your newsletter/article states) which is all I am interested in. was informed that this is an easy step but I feel very frustrated (did I mention that I am new to wordpress) CAN SOMEBODY PLEASE HELP.

I need to set up these directory by monday.