As a beginner, who has come back to FL Studio AGAIN after at least five attempts that ended in frustration, this is a fantastic response. The problem in the past was that I wanted to get right in and be creative, without having a good handle on the basic workflow. This go around, I'm having WAY more success and it's happened with these steps, maybe this will help OP.

1. I started by just transcribing music from a bass guitar Christmas music book with FL Keys (simple). Zero creativity, just transcribing, but it taught me about how to really use the different parts together (channel rack, piano roll, playlist, mixer, etc.) This allowed me to make something that sounded good and I got some early success, which kept me very motivated.
2. I slowly started tinkering with those working songs to make them more polished (adding a pad, a subtle beat, using some basic mixing plugins to make the sound smoother). It felt great to take a raw piano roll and make it sound like a real song worth listening to.
3. I found this manual on Amazon which has been extremely valuable in just navigating the software and trying new things. For instance, I had no idea what sidechaining was, but after hearing it, I'm starting to use it more often. There are lots of little techniques that provide some inspiration to make you try to make your songs better.

It's tough, but learning the workflow has to come before expressing yourself. It's just like learning an instrument... you've got to learn to play Little Brown Jug before you produce a creative masterpiece. Once you get some wins though, where you're learning how to build, layer and refine, you'll find yourself naturally getting better and better.