Practice makes perfect. 
You should keep practicing your writing, sharing it with others, and collecting feedback. The more time you commit into anything, the better you will get at it, and the same goes for writing.
If you need quick and easy feedback, you can ask me to review some of your work. 
You can also take classes, look at tutorials, and read a lot of books.
Reading books is a great way to learn how to write. 
If you are focused on poems, for example, put in limitations such as only using the Haiku format to spark your creativity. 
Good Luck!
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