Yes this does indeed sound like a first but it's got potential; I'm quite new to fl studio but I'll make some honest suggestions.
1) You're gonna have to come up with something to change up the melody, it was the same melody, unchanged for half the song.
2) Related to 1, it sounded as if you cut and pasted 2 songs from different genres onto the end of the other. I'm not sure what genre you were aiming for but it started with a hip-hop instrumental to an electro mashup of sorts.
3) If you look at the waveform on soundcloud, you'll see it's up and down throughout the song, you want to try and level that by filling it with a low/mid range sound and probably lowering the higher range frequencies with an EQ.
4) The track could 110% do with a bassline in the second 'half', anything! Just give me something haha, it sounds very upper mid-highs and just the kick to bring it lower.
Hopefully this is a start, but good luck with FL, it's a fantastic tool