Red pill.
I'd apply myself in high school, force myself to be sociable as a child, graduate with my bachelor's degree 4-6 years earlier with a better GPA, and get work experience and savings well before the COVID-19 pandemic. (I would try to stop it, but if someone told me that they had exact knowledge of the future, I wouldn't believe them, and frankly I would be worried if people believed me without further evidence.)
I don't need or want $10 million.
Red pill says restart at 6, not go back in time to when you where 6. I assume you will be 6 in the current time and have no future knowledge to convert into cash.
I was about 6 and a half when 9/11 happened so i would probably be telling everyone about that and end up getting arrested by the bush administration. Ill take the money
Red for sure, I could have way more than 10 million starting over with all the knowledge I have now, plus I wouldn't wait so long for certain things.
10 million cash instantly would get you killed so fast, just look at ANY article about lottery winners getting their life just absolutely fucked up. Resetting at 6 would suck too but at least you would get something out of it.
Blue pill: I would die of boredom if I had to go back to school for more than a couple of days.