I think i would take a lot of weapons with me and god, would I change history, i would exterminate all the forces which even look like they would want to try to prevent scientific progress, and than i would force everybody to at least get one Doctors Degree in natural sciences, and by now we would at least have quantum-computers.
This may be the highest good or highest evil - or perhaps amoral. You will prevent everyone living on earth today from being born and instead have billions of alternate descendants take their place. The world may be more technologically advanced (such as space travel by 1800s), but the only individual from our reality that would exist would be you, because you essentially copied your body's atomic structure into this new reality, avoiding the supposed "temporal paradox" or "grandfather paradox".
Everyone alive on earth today is the result of 10000 BC sumerian war rape, interacting religious dogmas, and butterflies beating their wings
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