Hi there. I am studying hypnotherapy and have learned that it is better to experience hypnosis directly with a certified hypnotherpaist first, before practicing on your own.
Research hypnotherapist in your area and make an appointment. The hypnotherapist can teach you self-hypnosis that you can practice on your own. Hypnosis is not a miracle cure and takes time for change to occur (but less time than many other therapies).
Also, make sure the person hypnotizing you is certified by boards such as the American Society of Clinical Hypnosis (ASCH). I recommend seeking someone who is also a licensed therapist, psychologist, or doctor.