I chose to take the Society for Editors and Proofreader’s introductory course to copy-editing (while completely bypassing the proofreading course they recommend you start with) and I’m pleased to show off my certificate for doing so. I’m not sure yet if I’ll do the next one as this one covered all kinds of text (and I have no interest in non-fiction) and I assume the next one will be the same. But, I have earned three points towards an upgrade to a higher level (I need seven), so all that remains now is to practice.