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 really helped me with understanding the human mind better. I learned what the cause of psychosomatic illness is, why I have unpleasant and unwanted emotions, why I feel uncomfortable in certain situations when I shouldn't and what I can do about it. I think this is very important and useful information in order to live a more happier and productive life.