Yes over water causes yellow, droopy leaves
They like light, but may need shaded in high summer (maybe the last week or 2 has been too sunny)
They like fresh air.
Water when soil dries out, but in winter only water every month or 2.
The above is all courtesy of 'The houseplant expert' Dr.D.G.Hessayon... 1980 edition, bought for 50p at a shelter charity shop a fortnight ago

.... I have edited a bit, obviously, it goes into much more detail. HTH