Tips for a v short weekend in CPH (Copenhagen)

Hi everyone,
Im looking for some recommendations, I will stay in Copenhagen from friday 7/12 night to sunday afternoon 9/12 with two friends.
Therefore hoping to make the most of the city in, basically, one day.
Where would be a convenient place to stay to be connected with the main sites of interests of the city?
What are the un-missable :
places to see... meals to taste... atmospheres to feel?
Tak!!!
Kindly,
Xavier