A writer who isn’t confident can always grow. If there is something you don’t like about yourself — a habit or certain traits, for example — you can set a goal to work on improving upon those parts of you. For a writer, “not having confidence” is not a permanent fixture. Over time, you can work toward feeling more confident in the things you are writing, submitting, and publishing.
Been having a crisis of confidence myself. This was timely.
via Don’t Let Your Confidence Issues Stop You From Writing – Novelty Revisions