Bicycle or Tricycle for kid with low tone

I told my family that I want to buy an adult tricycle to ride around the neighborhood since I don't drive. My dad takes me to work but I want to be able to go to the nearby stores and maybe the library. My family thinks I'm going to look like a dork on a 3-wheel trike and they want me to learn how to ride a 2-wheeler. I have never been interested in learning to ride a bike before and I have trouble balancing. I'm also really afraid of falling. What should I do? I'm going to the store tomorrow to pick out a small kids' bike with training wheels. I need to do this because my family doesn't want me walking around the neighborhood alone for fear of me getting kidnapped. Any advice would be appreciated.