Tips for aliens in New York:

Land anywhere, Central Park, anywhere. No one will care,
or indeed even notice.

Surviving: Get a job as a cab driver immediately.

A cab driver's job is to drive anywhere they want to go
in big yellow machines called taxis. Don't worry if you
don't know how the machine works and you can't speak the
language, don't understand the geography or indeed the
basic physics of the area, and have large green antennae
growing out of your head. Believe me, this is the best
way of staying inconspicuous.

If your body is really weird try showing it to people in
the streets for money.

Amphibious life forms from any of the worlds on the
Swulling, Noxious or Nausalia systems will particularly
enjoy the East River, which is said to be richer in those
lovely life-giving nutrients than the finest and most
virulent laboratory slime yet achieved.

Having fun: This is the big section. It is impossible to
have more fun without electrocuting your pleasure
centres...'

From the book "So long, and thanks for all the fish" by Douglas Adams