I would check to see if it is habitable
then since I would never find a planet without a vast space navy I'd set up a planetary defence capable of killing a space fleet double of mine own.
Then I would choose a place the most like my own climate and set up a capital city of my world wide country based on mine own rules and laws
the name of the planet?
Planet: taco
my country's name?: Willah
the capital city's name?: awesometown
it would be a utopia for everyone that agrees with me due to ,e not being a politician
though I would immediately turn myself into a deity
and this propoganda poster would be put up everywhere:
if any sentient species were discovered they'd have to vow aliegence or I would keep a small population to keep the species alive then I'd obliterate the rest
also I would make funny treaties with Earth countries but not others
Canada? yes
New zealand? yes
America? no just to be a dick, nothing personnel I just want to see the look on the faces of america's politicians