idk about FL studio specifically, but I'm pretty sure the only tools you need for mixing are going to be like, "Reverb," "Compression," "Noise Gate," "Equalization," and maybe a Delay and some kind of thing for color (oversaturation/distortion-- basically a special configuration of compression and Eq). Err-- and those are all things that you can do in other DAWs, in Audacity even.
Your levels seem fine in the sample provided. You could maybe maybe stand to turn your vocals down a little little bit but they're not even unusually loud, just at the louder end of "normal." You could add a little reverb here if you wanted, but since the song is so energetic you might not even need to. I had to go back and listen to see if you actually had reverb on, which I generally take as a sign that it isn't important; if it sounds good, it is good.
Anything specific you want to know?
