Only caveat is, and this is where I feel bad, if the person hasn't learned something new in a very long time, they forget what it feels like to change, or even become convinced that they can't. It can be hard to convince someone that no, you don't need to have aptitude or be any good at it after a few days, weeks, even months. You just need to keep doing it. As long as the goal is realistic, you'll succeed. Whether you are more or less "talented" than someone else affects the timeline (a little) but you are going to the same place (again, realistic goals).