I doubt you could go past a hand-made guitar from a good luthier near where you live, especially if they make to order. Apparently Martin makes a guitar designed especially for women. I've had a small bodied Washburn for years. With light handwound strings and low action it has minimal effect on my chronic neck and shoulder pain. Other musicians I know love it and keep trying to take it off me. They get hooked in by the tone. As for loudness, how about a small amp?