What makes me aprrehensive about public speaking

Public speaking makes me nervous because that means I have to stand in front of people that I don’t know and I have to memorize information to share with everyone else. The process of habituation sounds like it should work because by practicing over and over again I would get use to the idea and not be so nervous. The second thing that worries me about speaking in public is that I have to memorize information and if I forget something or get something mixed up I would just feel embarrassed. I feel more comfortable speaking in front of people that I know, like in high school since I knew mostly everyone in school it sort of comforted me that my friends were out there. I know public speaking is important in life like in classrooms or at a workplace.