This is another of those statements that doesn’t make much sense to me; choose your destiny or change your fate/destiny. If such a thing as fate or a destiny exists, it assumes that your future is decided. Having a destiny means that your future is written for you, if you can change that story, than it wasn’t actually destined was it?
So you either have a destiny, that can’t be changed, or you have free will to determine your future. If you can change or decide your future, there was never a destiny.

Personally, I don’t think anyone has a fate. We all choose the direction of our lives. There is no plan, no one has a plan for us except ourselves, and we realize the plan by the choices we make.
So stop saying that we can choose our fate, is makes no sense.