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 helped me to realize how my confidence and happiness level had gradually eroded as I'd gotten older - and that the solution to this lay within me. It gave me incredible hope and helped me understand how to gain back that confidence and happiness.