Do I need to copywrite my story before hiring an editor or illustrator?
No. Don’t be afraid of losing your story. Nothing is going to happen to your story. And what would you do if someone did steal it? Your copyright is merely a tool to be used in court. You would spend more money on legal fees than you could hope to gain in damages, and that is if you could find a lawyer that would handle such a small case. As long as you only send your story to professionals within the publishing world, you will be fine. You can find complete information about copyright here.