I wouldn't change anything.
I used to think I would change the day my Dad was killed but then I most likely wouldn't have the life I have now. I would not have met my wife and I can't imagine my life without her now.
Perhaps that is why we are not given the omniscience to know the consequences of what we might change.
I do a lot of public speaking and like to use movie themes and concepts and/or characters to illustrate the point. Those with the interest and ability to understand generally get the point that way without insisting on making it too literal.
But one provocative theme was in the movie "Final Countdown." The concept was the modern aircraft carrier Nimitz going through a time warp and emerging December 6, 1941, in a position to intercept the approaching Japanese fleet.
Once they figured out the situation, the debate between the officers and one civilian observor on board, was provocative. There was enough fire power aboard the Nimitz to destroy the entire Japanese strike force and fleet, but unable to communicate with Washington, and a President who had been dead for decades, did they unilaterally take action to prevent an event that hadn't happened yet and only they knew was about to happen? Unilaterally start a war that hadn't started yet? Communication with other authorities was futile because the Nimitz didn't exist in 1941 and nobody would believe them. But they were officers sworn to do their duty against all enemies of the USA, foreign and domestic.
But what would that do to the course of history beyond this date? The Japanese people who wouldn't live. The people at Pearl Harbor who would?
As one of the characters pondered he said he doubted changing history would be so easy.
What would any of us do in that situation?