Keep at it dude.
Guessing you're new to this?
Thing to do next time round:
- use a few more notes in your melody
- layer your melody with a few other instruments
- add a bass synth and copy the notes to that too
Try to aim for 3 or more instruments if you want to hip hop.
Even a piano piece will usually have a:
Drumkit
Piano
Bass or Bass Synth
Hope this helps