About me - only grade 2 piano (years ago). Since then I taught myself through some sheetmusic and youtube videos on and off for a few years. So I understand the basics of sheet music.
This song took me about 2 weeks (2hours a day) to learn and to know it by heart (even though I still make misstakes when I'm nervous).
Overall - this is not so easy that it sounds stupid and not so difficult that you quite after a week. Honestly in love with this book ❤