Are the documents open to the public, or private? That is, is it okay for a user to share a direct link to the document with someone else?
Yes public document files. and Yes ok for anyone to share the link.
you want to “upload a file to your media library, and then automatically insert a link to that file on your News page” ?
Yes something like that. Or as close to that as possible.
Thank you for clarifying my scope. I wasnt expressing it well enough earlier.