The idea is not bad in the first place. But the main (and massive, in my opinion) problem that I have with your composition, is the constant dissonance between the instruments. In the beginning, the harp is in major, everything around is in minor. Then it feels like a mix between major, minor, and chromatic randomness. It's unfortunately a bit hard to listen to because of that.
If it's done on purpose, then it's simply not my style and it's fine.
If it's not done on purpose, then I really suggest you going in the basics of music theory (scales, chords, harmonies, etc).
But don't give up! It's just a matter of learning, pretty much anyone can do it. It just needs time, patience and work.