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.
It was the first book that I read. It was fairly easy to read and comprehend. It also has methods to overcome the things that keep a person from accomplishing what they want in life. This book really helped me to be happier and gave me a way to help others become happier and more able.