well if you want to post it then go for it. write for yourself and don't mind negative comments. you write because you want to, like passion you know. it's okay not to be good enough, people makes mistake, we grow up not to be perfect.
take the critiques as something to improve your writing and ignore all the negative comments from the haters...haters gonna hate anyway.
good luck!! be confident, you will get better if you try and try

Well, I don't honestly know. Writing is still an art. Everyone is a beginner at some point, so that's fine! You're allowed not to be good! But as with any art out there, if you don't have (excuse my directness) the balls to face critique, then it's probably not a good idea at all. Seeing how stories on here go, even if you write very badly you'll receive a lot of positive comments because people in general are happy about stories no matter how well they're written. They appreciate reading a story, that's it. But then you'll occasionally find users like me, who either ignore you as soon as they see you don't want to be critiqued, or leave you 2k words of "this is what you did wrong and this is how you can fix it". It's not to hate, it's to help, but it can be harsh. Can you take that?

It's ok i don't have any courage to write because ny English is so bad