Assume that the future can change based on your actions, so any historical information that you bring along with you from the intervening 25 years may quickly drift out of the new realities history.
Edit: also assume that you can be given a healthy 21-year-old body if you want or take your previous self’s place.
Further, identification will be provided for you if you were not born at that time.
I would have no inclination to take over the world. But if I could go back to that date, I would make a million different decisions over the next few years to steer my life in a much wiser direction.