I figured this out on the piano but I'm not sure what key this would be in. Once I figure out the key I feel I can start to write more of it. I notated it in C Major with accidentals because I don't know the key.
I've added everything thus far. Ignore the roman numerals and the droning F notes at the start, for some reason MuseScore won't add lyrics unless I have a note there - they stop at bar 18.