IDK why you have so low rate , and this only first song ! This maybe not so intergity , but really cool !
Awesome ! Respect :)

Lel, this song sounds kind of disconnected because you use the blue ready-made loops. I used to do the exact same thing. But yours sounds better than mine though, so good job! I don't know how to help you except to say the MIDI instruments of GarageBand sound very bad without the right effects, and unfortunately I don't know what those are. Keep on practicing, you have potential!

Great job on your first song Toxic. I think it's amazing and I hope you continue making songs in the future, keep up the great work!