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: A New Slant on Life.
It introduces so many basic component parts of Scientology and gives the reader not only an understanding of what Scientology is about, but also validates several principles you may have held for several years which had never been acknowledged as being survival values before.