Escapist hobby

The paragraph originally written by a student has been revised by me. Please help me correct the errors. Thanks!

My name is Peggy. I am a little bit chubby and bespectacled girl, but I’m a cheerful person. Everyone likes me because I always greet people with a radiant, heartfelt smile. In my free time, I love reading novels, especially science fiction. Reading sci-fi is an escapist hobby, so that I can escape out of my own world into places and times that do not exist nor ever will. It's not only entertaining, but it can also teach me something about the world. It's a healthy way to deal with my stress. My dream is to be a doctor in the future. I like helping and making people feel better. I possess a unique combination of high emotional quotient and a sound scientific approach. I feel that my personal mission is to help humanity defeat diseases and overcome suffering. Becoming a doctor has always been a dream of mine and I work hard to make it happen.