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.
I first got into Scientology in 1990 after reading the book - Dianetics the Modern Science for Mental Health. This book, which to date remains my favorite, not only provided me with a clear understanding of the mind but also showed how to deal with the many problems which plague so many people.