Help adding Vote functionality to my blog

I do photography on the side and I’m trying to start a Senior Portrait Idol competition. This is where I have 3 posts of Senior sessions I’ve done and I want to have people vote for which one they want to win. I can’t for the life of me figure out how to get the Vote It Up plugin to work. I’ve read about modifying the index.php, placing some code in the “WordPress Loop”, but not being a programmer, this is all Greek to me. Please understand I’ve never done programming before and offer any assistance you can as I’d like to get this working just as soon as I can. Thanks.