The answer is it all depends on what you want to change. For just sampling hypnosis, a relaxation induction and session can be used to just bring about a feeling of calm and peace. Many use a short session during their lunch so they will be more refreshed and alert in the afternoon. Another way of using it is for enhancing individual senses.
There are also other ways that help with relaxation and calming the mind. A couple are meditation and yoga. Some say they can’t do yoga, the body isn’t limber enough to do all them poses. That is why there are beginner courses. It is similar to martial arts, you don’t start out at an advanced level. And for meditating, slowing down the mind while calming all them neurons firing around in the brain is a great way to start.
Anger issues sometimes deal with anxiety and stress. By learning to breath deeper will help relieve some of these feelings. It is a process that needs to be self-monitored, switching over from being a shallow breather to breathing deeply will take a little time. Any time that you need to calm down, switch your focus on your breathing.
By trying new things in your life, going new places, while meeting new people could also help by your brain constantly being busy processing new information. It’s possible you could find new hobbies that keep you focused while you are enjoying new experiences. Try things like bowling, tennis, golf, chess, off-road riding, or a number of other things that could lead to a lifetime interest. Maybe even singing or practicing anti-gravity.