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: The Fundamentals of Thought.
This was the first book I read about Scientology. IT reinforced a deep feeling I'd always had that I was basically an immortal spirit. And that most of the problems I was experiencing were related to the “Reactive Mind,” which could be handled with Scientology counseling.