First, I would use 1.8 billion of it to buy the New York Yankees and then run them into the ground, I'm talking about starving them of funds so hard that they won't be able to field a team good enough to beat the Baltimore Oriels[footnote]if you don't know baseball, the Oriels are one of the worst teams of the current era[/footnote], I would then dump the team for something far less than I payed for it. Then, I would buy the Seattle Mariners, and help them become the best team in baseball. After that, I would buy a regular house that isn't super big or anything, I'm not big on the big mansion idea, I just want a place to live like a normal person. Of course, I would go and run for political office, I like the idea of being able to represent my state and helping the country as a whole.
I would also lobby for higher taxes on the rich.