Does it mean you don't like what you wrote? Because that's part of the transition to write fiction. Everything needs a lot of editing and improvement all of the time. I'd rather write an academic paper. Had to do a lot of those and I like researching.
About myths, the important thing to know about them is that they are the first attempts to explain phenomena in human times. Some of them are stories about the beginnings or why something happens or is the way it is. It's a fascinating experience.
There's a YouTube Channel called Crash Course that does an interesting take on how to introduce people to the whole myth thing. It's an amazing work and it gives you some references to start digging more.