Like it!

Much better than my first piano track i tried on FL!
Try assigning the piano to a mixer track then opening "plugin Presets" under your browser and "Effects" under that sub menu. Tossing in an Ambient Reeverb and a Default Parametric EQ and shaping the Parametric EQ bars to almost resemble a "V"

I find it makes the piano sound 1000x better and more full.
If things are not where I suggested keep in mind I use a FL that is 4 versions ago =P

On your way!

Heh I still use FL4.51 =D
Sounds like you're well on your way and learning!
Keep at it, we want to hear more!