That was a really long answer, but absolutely correct. To simplify, just sit at the piano and find the set of 2 black keys in the center of your piano or keyboard. D is located between the 2 black keys. Middle C is located to the left of D.
The Wellerman sheet music: tabs, chords & lyrics for piano, guitar, & lead! A fun sea shanty to sing & play - 7 versions, including one with note names.