You should ask yourself why you want to become a tutor. If you are interesting in becoming a teacher at some point in your life then tutoring is a great start. Most people when asked why they want to become a tutor is that they want to help other people, you have a great flexible schedule, it is a way to meet people and help them achieve their goals.
You can become a tutor at any age but keep in mind that most people who are in the need of a tutor will not hire a tutor who is less than 17......