How can I learn how to self-hypnotize? Anyone tips from people with experience? Its for my addiction.?

Ever since I tasted candy for the first time I was addicted. My parents didnt let me have a lot of candy, but ever since I was like 1 1/2 and had my first sweet candy, I became obsessed. I literally would go into friends apartments(our neihbors) and find their candy. This was in Europe in a less dangerous time. Anyways, I need to stop because I literally feel bad if I dont have candy, but I want to be healthier and limit my intake to one candy bar a day only. So can anyone give me any tips on how self-hypnosis can help? How do I start it and what do I do? Thanks!