I have to agree with Xalet. If at all possible I would keep your character relatively healthy. Now, of course sickness and injury happen. It is unavoidable sometimes, but in a world like Mizahar such things could lead to the death of a character, especially one planning on traveling.
Now, my recommendations? If you have to get an injury then you want one when you are with companions to help you. Mental damages are difficult to survive with for anyone in Mizahar. In this world death is just a hairs breath away given the situation, but of course many do manage to survive given a little know how and creativity.
As for functioning in society, as Xalet said its all about the city. For a city like Alvadas, where mental disorders are as numerous as the stars in the sky, there is every possibility that a person could function reasonably well. Other cities have other standards of course, so take that into consideration before giving your character any kind of mental disorder.
Hope this gives you a little help as you ponder your ideas a bit more