I am a quilter and I have taught beginning quilting classes. I would be happy to help you in any way I am able. I would recommend that you use one of the fabric in the front of your quilt for your backing as this offers the best continuity. Of course, the beauty about making a quilt is that you can do anything you like.
I also would be able to help you with your batting and with the binding methods as well. If you desire, just send me a PM and I will gladly do that. Quilting is both fun and rewarding!
Here is a picture of my first quilt (It's called a Rail Fence):