Hi @chelsea.kelly09 I am not a guitar player so I can’t really offer much advice on this chord shape except to say have you watched @BanjoBen 's lesson (see below) on defining a chord.
A chord is made up of three notes the Root Note, the third and the fifth tones of a scale. Often expressed in Roman Numerals I, III, V,
The fact that this tune is played in drop D tuning doesn’t change that rule. All you gotta do is find those notes close to the shape your looking and you should be able to work things out from there. A map of the fingerboard in Drop D tuning should help speed the process of finding the locations of these notes.
Check this out https://www.gtdb.org/dadgbe
And be sure to watch Ben’s lesson below. Good luck