How can I make people laugh when public speaking?

I am sorry that you have not got a response. It is great what you are trying to do. You want to set folks at ease while letting them know about you and you problems. Maybe people d not want to sem like they are making fun of you by helping you poking at yourself. My brother went blind many years ago. He pokes fun at his lack of sight all the time. One time he sad that here still enjoys driving, but it makes his wife nervous. If you relax around people ten they will be more open to yu and you will win them over and they will relax with you. I think you are on the right track and will do fine. Best of luck.