Get the military to fund me. High tech companies to build me a suit, then my first act would be to stop isis. Then like xmen apocalypse, I might try to conquer the world and become it's ruler. Don't worry, I'm all for equal rights, freedom of speech and human rights.
Hopefully try to use the epic size and strength to help people out a bit from disasters?
I'd also be interested in trying to find a way to use the power towards naughty purposes that lets me peek at naked ladies or something, but I haven't come up with a way yet where the size gives me any special advantage there.
I would probably be in a city somewhere acting confused and off balance, squashing cars and stuff. Then when the army and stuff comes, claim to be misunderstood only to finally fight a marvel character