Just be there I guess, contemplating and introspecting being lost in my mind.
I'd never wanna comeback, but then I'd realize a lot of my thoughts originated from down there, and eventually I'd want to meet someone like me. As for coming down I'd take off my shoe and throw it in opposite direction of Earth, the trajectory would eventually put me in Earth's atmosphere and then ground.
Once here, I could play a bit mischievous and pretend to be alien, then I'd get people to be nice, respecting of my space and patient with me, you know just the decency they won't show to everyone. And then I'd start learning music, programming, arts and everything I want with proper environment. Yeah man, I'd use all that just to have a dream human life. People being nice.