teaching... to do or not to do?

Hi I'm Jeana Eafanti. I'm 19 years old and I'm in pursuit of becoming a high school English teacher. Growing up I always wanted to be a teacher so I could influence a students life the way my previous teachers have influenced me. It would be amazing to share my knowledge and get to know students and their stories and adapt to them and the way they need to be taught. I've always loved kids, usually younger but I feel like teaching high school is more conducive. However there are cons to becoming a teacher as well. I'm horrible at speaking in front of people, that might be because I am uncomfortable speaking in front of my peers because they can judge me, or it might be because I have a legitimate fear. I can't decipher which one it is and I don't know if I will be able to overcome that in order to be a really great teacher. I don't want to be one of those teachers that kids just pass by, I want to be one that they remember for a lifetime. One that they can look back on and say she is the one that inspired me and if I don't get over my fear of public speaking I will never be able to do that. There is also the fact that getting a job as a teacher is becoming more and more competitive and the salary that comes with it is sufficient, but not great. I'm still only 19 years old and trying to make this big of a life decision is daunting and I feel like I have so many sides to weigh in to truly know if teaching is the right thing for me. I know I want to be an authority figure to kids and to be someone they look up to and can rely on. But is teaching the right way? Will I be able to do a good job?