there is nothing wrong with nuns who are allowed to work outside a convent by their spiritual leader going and taking good news to the poor.
i met a catholic nun recently who is a kind and Godly person.
dzheremi's favourite nun (tamav 'mother' irini) was a wonderful person who spent loads of time in prayer and education of the nuns (she was an abbess) and who also spent loads of time praying with all sorts of visitors to the convent. she was granted the power to perform various miracles and was very humble, accepting her multiple illnesses as tools for spiritual growth. i have an icon of her at home
but i expect there are catholic nuns like this too.