Reddit mentions of Absolute Beginner's Origami: The Simple Three-Stage Guide to Creating Expert Origami

Two things:

1. Dollar bills generally suck as material for a first attempt. The paper is thick and can be difficult to crease if it's a well-worn bill. I'd start out using at least regular typing paper cut into a square, or preferably legit origami paper.
   
   
2. That model looks really difficult for a first attempt. You definitely shouldn't feel bad about having problems. Start off slow - get a book designed for beginners (I think I had this: http://www.amazon.com/Absolute-Beginners-Origami-Nick-Robinson/dp/0823000729/ref=sr_1_9?ie=UTF8&qid=1347652979&sr=8-9&keywords=origami), or look up any of the dozens of free patterns floating around on the internet. Making a bunch of easy stuff will help you become familiar with the types of folds and the mechanics of how folding works.
   
   Good luck, and don't give up!