Hi Sean, as an editor I run permissions for authors. It’s a case of contacting each right-owner (author or publisher) where the quotes are not deemed public domain, and provide them with context for approval. You can do this yourself or I’d be happy to quote for the work, if you’d like to contact me directly? My email address is firstname.lastname@example.org.
Reach out through an editor’s professional website. Many professional editors offer their services on a freelance basis or use their website to advertise their press’s opportunities. Perform a simple search online using the editor’s name and look for a professional or personal webpage. There will be information about contacting an editor on their website.
Obviously there is a big difference. I actually started with screenplays (with some mild success) partly due to hearing that as long as you have a good story, the grammatical errors won’t be a big deal. Well, that was not true. Maybe if a producer liked the story or I was already established but every contest I entered always came back with feedback about the grammatical errors. Even if I won or placed as a finalist, I always received critique on that. Very little is spelling error, it was more about structure, etc.