Rachel I think you are very smart to be thinking about your future and asking questions like this. You won't be able to go trucking until 18yrs old. That will only be within the state.
When you turn 21, you can go Over the Road.
My only regret about trucking is that I didn't start at 21!
If you plan, you can be retired at 30 by starting that young and researching information the way you are.