If we take destiny as the final outcome or a series of life…

If we take destiny as the final outcome or a series of life-changing events, and free will as our capacity to choose, we could see it like this: Free will is the player controlling the character while destiny is the story or level set by the game's design. You can choose to stray away from the story or even end the game short, or you can embrace it and go through all the challenges and growth, leading to the 'intended' ending.