If you are looking for ways to get started, I would recommend seeing if there are ways you could get involved in childcare now. Maybe you could get a part-time job at a daycare. If that is not possible in your area, consider volunteering at a church or community center where nursery-care or childcare is provided. It will be very important for you to understand the rules and regulations that go into running a childcare center.
Since you are considering owning your own business, consider taking college courses in finance, accounting, marketing, advertising, and other critical business areas so you will have a good understanding of what it takes.