There are a lot of ways you might tackle this problem, and it’s worth thinking about the way that’s right for your work flow. If you’re working with an imported model, I might think about creating your camera path in your modeling package, and then just worry about controlling the speed in Touch - this is probably one of the most straight forward approaches.
If, on the other hand, you have something you’ve made in touch, and you want to animate it nativity, you might look at the camera blend, or you might consider the animation COMP. It really depends on the way you want to work.