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.
This book really helped me with learning about some of the basic principles of Scientology and gave me a new understanding of many things, such as communication, children, marriage, etc. It is a good book to start with to learn more about Scientology.