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 how the mind works and why people act the way they do. Psychiatry tries to confuse the mind as a tissue organism that sits in your head. This book tells what the mind really is and how it works. With an understanding of how it works, you can understand people better and what makes them mad or stressed. It gives you an understanding of what the mind is and how it works.