Career guidance is vital, before choosing a field of study remember to read widely. Students who come from disadvantaged background usually lack this vital component. They find themselves at university studying in a field they are clueless about. The career opportunities in the field, whats needed in the field and the opportunities still available to them are all unknowns. Of course this is not confined to students from poor communities only, some middle class and even upper class students are not acquitted with available opportunities.
Finding a good source of information is important, most sources are shallow and they give you a list of possible job opportunities