on Jane Friedman site:
You should be an editor.
Perhaps someone’s said it to you. Perhaps, after volunteering to critique a friend’s book, reading for hours, and writing 2,000 words of feedback (more than you both bargained for), you’ve said to yourself:
I should be an editor.
You love reading, right? And you’re really good with grammar and spelling. Maybe you even have an English degree or an MFA. What else do you need?
Curiosity, education, and ruthlessness.