If you want to get a hold of Hypnosis, it'd be best to find a mentor. Somebody who has experience in the field, and can help you on your journey.
If you cannot find a mentor, I'd suggest getting a buddy involved in the same practice (of make friends with somebody already in the practice). This way you two can help each other learn, and if one of you understand something before the other, you'd both benefit.
Another reference for learning material, which is very, very praised, would be "The Encyclopedia of Stage Hypnotism" by the Dean himself, Ormond McGill. I can't tell you how many times I've been referenced to this book.
Finally, one flaw that many people have is believability. The participant has to sincerely believe you can hypnotize them, if they do not, it can cause a rather large hinderance.
Hope this helps,
thank you very much for the books I will take a look on them
unfortunately all my friends thinks that hypnoses is not real
do you know if there is a way to get online traning/teacher in hypnoses ?