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 The Way to Happiness.
The Way to Happiness provided a good road to follow to be happy. It's a simple as that. I read and understood the precepts in it and decided to apply them to my life. In fact, I made a game of stressing one particular precept each day. It was fun and worked. This book gives you basic understanding on how to live.