↪ Hi There,
I am so glad you like the piece and feel free to do anything you like with it (or anything of mine). Sorry that I do not really know anything about arranging specifically for harp. I would have thought that you just play the chords with your left hand and then play the melody with your right, although I don't think you could play the second melody at the same time. Good Luck and Best Wishes, Toby

↪ Hi again. I compose the pieces using a midi keyboard connected to Cubasis VST 5 software. I do also have Cubase Elements 9 but I find that the sheet-music functionality is better on the older cheaper program.
If you get Cubase you can just read in the midi file which I provide and see all the notes up on the screen. You could also merge parts and take out the unplayable notes.
If I was a better guitarist I would attempt to create solo guitar versions of my pieces. I am hoping someone might come along and offer to do that sometime. But I am happy that elementary students can play the pieces as an ensemble too.
Good Luck! Toby