Hola Stephen. To be settled in se traduce como "cuando estés cómodo o desocupado".

to be settled in ---> estar cómodo o familiarizado con un lugar, trabajo o estilo de vida. call me when you get settled in for the day ---> llámame cuando estes desocupado(a). the context change so I can't use cómodo o familiarizado in your phrase, but people understand that if you are (desocupado), it means that you are free, comfortable, with no work or pending matters for the day. Sorry but I don't find another answer in this moment.