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 explaining the background of the boring way of thinking people try to get rid of. This book also told me something about the idea “Be yourself”. How are you when “you are yourself”? This is a question everyone should ask themselves, I think.