The ability to enter hypnosis frequently depends on the training and expertise of the hypnotist. If you have had positive experiences with hypnosis, it will naturally facilitate your re-experiencing it. If you are concerned that under hypnosis you might reveal some deep personal secrets, you should not be. You will reveal only what you wish unless the hypnotist is using unethical techniques, such as using mechanical devices or drugs to unearth or implant suggestions. A light hypnotic state may be sufficient to accomplish the goals of the session.
Most people can achieve a trance deep enough to allow for the process.
Hypnosis is one of many tools and techniques used to uncover information or to work out problems. Hypnosis is not a truth serum. There is no guarantee that all information obtained under hypnosis is accurate. Some people under hypnosis have been known to fabricate and lie. As a matter of fact, one can even lie after an injection of truth serum.