Two options.

If I’d go back, I would jump to around middle school and try to convince myself that dad doesn’t hold the true knowledge to everything, especially politics. It took me one Trump-term and a pandemic to realise that my dad has some opinions I really don’t enjoy.

Alternatively, I wouldn’t go back for fear of messing something up that causes me to not meet my spouse. I can handle a bit of mockery by my spouse for my dad’s beliefs, but I really wouldn’t wanna have past-me not eventually meet her in the first place.