The character traits are the subject to work for. The field conditions will provide that work-out. No, most never get acquainted with it at home base. That could be a training decided by the Father. But we believe it is a part of growing, and growing in difficult conditions is more decisive and proving than on a perfected slate.
Many Souls have no desire to leave home.
Some want to improve field conditions and feel the strength to be effective there. Some will succeed, but most will not. And there begins reincarnations. Yes, they do. That is where we learn what goes on elsewhere.