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 giving me so many answers to so many questions! It explains how the human mind works, where psychosomatic illnesses stem from.
After reading the book I understood where unwanted emotions come from and how life could become troubled and miserable for so many people. Reading Dianetics changed my life for the better.