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 Dianetics: The Modern Science of Mental Health.
This book addresses vividly the concerns and questions that one most immediately has about one's life. For me it was a marvelous revelation when I read it. Other books that are quite inspiring and useful are: "Fundamentals of Thought" and "Creation of Human Ability".