phantomkitsune
Something I've found invaluable is trying to write in someone else's style. It has to be someone whose style you like, usually, but getting out of your comfort zone and having to articulate exactly what goes into writing like someone else can make it easier to fall back on and refine your own voice. Like, try to write something with the dreamy quality of Kazuo Ishiguro and another thing with the alienation of Yasuko Thanh and another thing with the sharp satire of Terry Pratchett and you'll develop the tools to create the style that you most want and that most suits you.
I agree with trying this out.
Just short passages in another style can be a good way to kind of flex your writing voice.
Also, trying reading widely and deeply. Like when you read something, really read it. Analyze it. Take it apart and poke at the pieces. Try to figure out why a certain description fits in your mind, why one failed to bring any kind of reaction, why some dialog feels real, or why some feels robotic.
It's going to take a long time to develop a style/voice and not get discouraged.