Not to toot my own horn but here's a piece of music that I wrote that has some dynamic range and I've included a screen shot of the waveform so you can see it while listening. It's a relatively short piece (roughly 30 seconds) and can be split up into three segments: quiet intro to set the mood -- more dramatic middle section -- climatic point and outro which falls back down to the starting volume. Also notice that each segment transitions into the other creating flow and a steady idea.
Hello,
To OP: Your arrangement sounds rather abstract. In other words, it lacks the minimum of cliché a track like this needs to make the listener connect to it.
I'd advise you to get a good book on (piano) arrangement. Also get some piano sheet music (probably Chopin in your case!) and study it, you can learn an awful lot that way and easily transfer that newfound knowledge to other instruments.
And like Nathan said, it takes time and you get better the more you listen. Ideally, a learning cycle should look like this: Listen - Reflect - Compose - Listen - Reflect - Compose - Listen... etc. pp.
I know my fair share of theory, but don't really know much about classical music or the piano. I feel like your progression gets a bit stale. At the end it picks up a bit, but in the middle it becomes a bit dull. I'd also like to compliment you on your use of many different techniques in this piece. The left hand arppegios sounds good in particular. I'd have to agree the pauses are a bit too long, but they're placed very well in the piece. Good job, overall it's a very emotion invoking piece.
