A pretty easy going fern (if such thing exists) as long as you miss your watering schedule.
The Boston Fern or Sword Fern has a lush foliage that would look great as an indoor plant. Since it needs high humidity this plant is best suited for a kitchen or bathroom but can survive in other rooms as well as long as you can control the humidity.
Tip on improving foliage: add 1 tablespoon of epsom salt to 2 litres of water and pour over the foliage once every six months. This trick will help make the foliage greener, plus it will give the soil a boost of magnesium.