Transcendental meditation

Yesterday I watched a documentary called "Meditation, Creativity, Peace". During the film, American filmmaker David Lynch explained what is transcendental meditation (TM) and how it has helped him in his job as a filmmaker and to improve his life.
David Lynch is one of my favorites film directors. He has a unique and surreal style that in many cases makes you feel uncomfortable or disturbed.
Until yesterday I didn't know that he owns a foundation dedicated to promote TM in order to reduce stress and improve health and cognitive capabilities.
Now I'm curious about this technique that supposedly gives you effortless access to unlimited reserves of energy, creativity and happiness deep within.

I've been surfing the internet looking for detailed information about how to start practicing TM, and I found something that I didnt like. Apparently the best way to get started is not by your own but with the help of a certified teacher, and their fees are very expensive.
So I decided to give it a try by myself own and if It doesn't works, I'll forget about it.