Wow, those are some really nice guitars to learn on.
Strings can be a bit of a minefield, especially for acoustic guitar. However, I’d suggest one of the mainstream, middle of the road brands like D’Addario or Ernie Ball. As a beginner (or even beyond) I’d probably go light gauge 11-52, as these won’t wreck your new fingers too quickly and won’t be too thin sounding.
https://www.guitarguitar.co.uk/product/03121018032318--daddario-ej26-custom-light-acoustic-11-52
https://www.guitarguitar.co.uk/product/171122317049008--ernie-ball-2004-earthwood-8020-bronze-light-guitar-strings