Heya,
So Beat is good, pitched vocals are pretty cool. You'll need a sub bass (heavy one) or an 808 sub. Some snare roll could make it more groovy.
I've tried myself to make a trap song, but I couldn't find any idea. Here's what i've done :
https://clyp.it/loukhhc1If you're interested, I am. (Btw I'm using FL 12)
Pm if needed

Edit : After third times, I've heard you thing, sub is there but way too low. Need to bring it at least an octave higher.