Hello!! Welcome to YWS, we're happy to have you!! You're definitely not alone wanting to use YWS to help improve your English. Kudos to you for having the courage to come here for practice!
New sites can be a little confusing, so let me give you a quick rundown. The publishing center (where this is posted) is designed for original works of fiction (either poetry or prose) that you would like a critique on. Other users then critique your work and help you improve. If you're nervous about this, feel free to include an author's note at the beginning to let people know what you're looking for in a critique (and you could also let people know that English is not your first language and you're trying to learn). Publishing in the publishing center costs 200 points. The best way to earn points is through reviewing! Reviewing is when you critique someone else's work. The YWS Critique Sandwich is a great place to start for figuring out how to write a review.
As the person below me said, this technically belongs in the Welcome Forum. All of the forums are free to post in. You can also post things on your profile. Since you didn't know, I'll give you 200 points so you can still post your first work whenever you're ready!
Feel free to send me a private message, write on my wall, or comment on this post if you have any questions or if you need anything at all as you get used to the site! I hope to see you around soon! 
Points: 32055
Reviews: 1162
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