One must practice mindfulness to cherish and guard the vows in daily life as one would the wish-fulfilling jewel. Some nunneries have rules like the military. There is the possibility of causing great harm to others' minds. But there is also no question about the incredible benefit sangha can offer to people in the world and to all sentient beings. You know this very well.
Strong practice is needed.
One must meditate on impermanence, death and the lower realm sufferings for months and years and years. Of course, there are emptiness and bodhicitta as well, but I think the meditations on death and the lower realms are the crucial ones, the ones that help the quick realization of emptiness and bodhicitta, that prevent obstacles and purify existing ones. One feels immediate peace and satisfaction in the heart and in life. As Lama Tsong Khapa explained, following desire leads to so many problems. Our own life experience becomes a commentary on the result of Dharma practice.