I like the idea going on! I think you could definitely develop it some more and maybe add some percussion in later into the piece. Overall though, the melody, what I assume is a loop, and chords used all work very well together! And to your DAW, I used GarageBand on iOS for around 5 years before I finally got FL studio a few months back, so I can say with full certainty that GarageBand is a completely valid DAW and can be powerful if used correctly. Keep up the great work and don’t hesitate to ask for help if needed!