Boats Boats And Birds By Gregory And The Hawk How Long Will It Learn To Play On Guitar?

Boats and Birds by Gregory and the Hawk How long will it learn to play on guitar? - boats

I really have no experience on the guitar, but I want to play the song Boats and Birds by Gregory and the Hawk program for my school talent show. I want to know how long it takes to learn, and when it will be difficult.
I do not want to learn to play guitar, in fact, just this song.

Piano or easier?