I have a Maidenhair Fern hanging in my bathroom; so far so good - it's taking me longer to kill this one than previous ones! They are just so darned sensitive - watering one day too soon is lethal; drying out for 5 minutes is lethal.
What other plants can cope with indoor light for the longhaul, that are maybe a bit easier than Maidenhairs?
Of all the bathrooms I've visited in my life(!) I'd say mine gets 7 out of 10 for brightness - no skylight, but the window light is probably sufficient for very low light plants.