[Glitch]

What I would do is ---
if it's in a fantasy setting you just make up your own economic rules so it's ok if you don't know how it would work in the real world, this is your world, it works how you want it to work. On the psychological aspects you could just do a bit of research and learn the basic habits and tendencies of people with whatever ailments and then just continue on writing them that way.

The best thing to do, I think, is just keep writing. When it's finished you can either go through and mark up everything you need to flesh out or doesn't make sense. You could also have a copy editor or somebody who knows something about writing do that part for you and then start doing your research and figuring out how to fix all the things that didn't work quite right.