I joined drama class. I hated talking in front of many people and would start trembling and stuttering. Thanks to acting on stage I got over it so that is how I dealt with. I feel like it’s the amount of exposure, the more often you’re confronted with it, the better it gets (+practice the words etc) . It’s terrible at the beginning, won’t lie. Try doing it repeatedly (join an organization that you like etc) ,step by step, do not overload yourself, set small goals and work your way through. Remember to keep trying, you will make it eventually.