Hi Lily and welcome to Orchid Board.
In my view the key to looking after Phals is to get the watering sussed. First make sure the pot has holes in the bottom. Second, if you can, pot them in clear pots, you can then look at the root colour and if they are green down to the bottom then don't water yet, if they have gone silvery then it is time to water. If you can't get a clear pot then use a wooden skewer pushed in to the medium. Pull it out and if it is damp then don't water yet.
Basically you need to water thoroughly, then let it drain (hence the holes in the bottom), then wait until it is completely dry before watering again.
People here may be able to work out the type of your third orchid if you post a picture. It's not always possible but may be worth a try and you may be able to get care advise if you do that.
Anyway, welcome again and best wishes for your pending arrival as well