Before you decide not to write, take a little time to think about why you write.
The gods know, I'm not the world's greatest writer, and I fuss and rewrite and drive myself insane rewording things until I publish because I'm going to over-tinker and scrap the whole damned thing otherwise. And then I agonize over what I published, and if it's utter crap.
But at the end of the day, the stories want OUT and that's why I write. I try to improve, actively, but I won't stop writing while I'm learning.
Knowledge and skill come with time and experience. You'll be fine.