A beta-reader, if you please!

Hi! I'm a 10 year veteran of the USAF as well as a new-minted MD. I can't really do traditional beta work like proofreading, story arc, characterization, etc due to both time limitations and excessive neuroticism. I'd be happy to explain how things might actually work in either military or medical settings, and would also be glad to help come up with macguffins in either.

I could obviously do this for any fandom, but those I'm personally familiar with include:
Due South, Harry Potter, both Stargate SG-1 and Atlantis, Avengers and related movies, Supernatural, all variations of Sherlock Holmes.

I've been lurking in fandom for over ten years now (longer than I've been in the service by a few) and it has just now occurred to me how I can contribute. Sorry for being so oblivious, fandom!