Welcome to the Quilting Board from the State of Nebraska!
Here is a blog link that gives an instructional tutorial and charts to tell you how much fabric you need and how many squares from each fabric that you will need to cut (depending on the square size you choose). It should simplify the process for you, and it's much more organized than what I could tell you. Good luck with your project!
http://jubileehomespun.com/info/Quilt_Instructions.htm