The easiest way would be to capo 2 and play out of D, or capo 4 and play in C. What I would recommend is to sit down with the banjo, and pick out just the basic melody out of both positions. For this song, it might be easier in C position. (Make sure to check out the Waypoints in C lesson too! It’s great for getting different positions under your fingers.) After you get the basic melody under you fingers, try adding basic rolls and slides, hammers, etc. into the melody notes. Finally, add some licks for some extra polish.
Alternatively, you can try tuning your banjo all the way down to open E like a long-necked banjo. Depending on your banjo and setup, this might cause issues with buzzes and such. However, the most versatile option is to learn both D position and C position.