With all jokes aside I actually use it all the time with my music.
Here are some songs I've made.
Kited Dankness: https://www.newgrounds.com/audio/listen/589926
Lost Wolves: https://www.newgrounds.com/audio/listen/582779
Stormy Newcan: https://www.newgrounds.com/audio/listen/588279
My advice is you should always AVOID using the default samples they give you at all costs. I'm talking about the piano, guitar, and string files that you can choose by scrolling through that left menu. They're complete sht. Although it may look crazy hard at first, try to use plug-ins instead whenever possible.
Also, NEVER make your songs too repetitive. Trust me, you don't want it to end up like Stormy Newcan. The melody's awesome at first but crap gets irritating fast.
I made Lost Wolves back in 2014 and it has a catchy tune (I guess?). The problem with that song is that I used the same synths and samples over and over again that it gets bland after a while. Don't do that either. Try to mix up the instruments you choose from time to time too.
Kited Dankness without a doubt is my best song. It has variety, and also somewhat of a sick beat and buildup. However, I don't know what genre you're planning to pursue, so my advice here might not be all that helpful since all my songs are dedicated to a mix between EDM and dubstep.
I can't really go anymore in-depth with advice however since I don't know what version you're using. I'm using the FL Studio DEMO version (literally). Tell me yours so maybe I can elaborate.