She may or may not have tried to work a normal job when she and Eustace were first freshly orphaned but they both found it very difficult to fit in at first and it wouldn't have been long before she dropped it and went into the Society instead. Tuya didn't give herself much time to grieve since she had Eustace to look after and it very quickly turned to a burning resentment at whoever it was that was responsible for robbing them.