Like changing the past
Just like you can’t change the past, you can’t change the future either. However, you can go a decent way in making it so the future is somewhat what you want.
Set the dominos in motion that will change your future for the better, and do it now. Don’t project yourself too far in the future, and equally don’t ruminate on the past. put your focus on making the most of the now. That will change your future.