I'm trying to get some idea of the level of this lovely piece. It doesn't appear to be part of the Australian Music Examination Board syllabus so that's no help.
However, as a reference AMEB does have Tarrega's Lagrima at grade 6 and Adelita at grade 7 and Brouwer's Estudios Sencillios #17 also at grade 7.
When I was ten, I thought my parents knew everything. When I became twenty, I was convinced they knew nothing. Then, at thirty, I realized I was right when I was ten.