Creative Editing Courses?

I've been doing a lot of amateur theatrical videos along with some local community news and a little non-profit video production and editing, and would like to up my game in postproduction work.

Any thoughts on courses on-line or in the New England area for the creative aspects of post production? I'm not very concerned about the technology or tools, but would like some help with the aesthetics. Most of the courses I've seen have been largely focused on how to use the tools which, as I said, isn't a major concern.