If you want to find out more about Dianetics and Scientology, the best way to do this is to read an L. Ron Hubbard book on the subject. I personally recommend you read Scientology: A New Slant on Life.
Do you want to REALLY know what Scientology is about? This book is great for a new person. It goes over the basics of Scientology and actually gives you tools that you can use to improve your life right now. The knowledge contains very powerful basic truths about life that you can apply to any area of your life. It helped me increase my confidence and be more in control of my life.