If you could time travel?

Sometime before WW1 with a sack full (Blueprints of the STEN Gun fore example like the protagonist of "rebel in time") of "spoilers" which, I hope, would alter the World.....If I thought that would be a good thing, but I don't.
Selfishly, like the original poster, I'd go back to about 1992 so I could tell the girl I know I love what I should have told her then and, just maybe, I wouldn't fuck it up.

I'm going back and putting all my money in bitcoin!

I would probably teleport myself back in time when I went to high school. I would have tried to go to veterinary school because I regret it very much now. I am an engineer and my job is boring

Go back to like 2019 -2018 and stop the coronavirus

i would be tempted to go into the future and see who won the 2020 election (im dying to know)

Go back to like 1991. Make some smart investments. There are tons of billionares out here who invested in like 1 thing at the right time.
Pick up a bunch of domain names. Invest in tech stocks. Sell before the crash in 2000. Buy Apple, Amazon after that. Bitcoin. Sell at like 16k.

my life in the past had some beautiful parts, some great chances which I hope to be able to use them again

BUT

I had a lot of pain also which I can't stand again, I can't even think about it now, it hurts me

I'be goes to the non Putins Russia, and kick off Putin to the gulag.

I don't want to live in the past or the future, I need to live in the present

my childhood because it was the besssst! no responsabilities