I would not worry about them being too big, we had one where her eggs were as big as my entire hand.
What you need to be concerned with is an incubator. Once your female lays, those eggs will not last long without very high humidity and a tight temperature range. You should consider buying a commercially available incubator or repurposing an old mini fridge with a heating element and high quality thermostat. You should consider getting this ready as soon as possible. Do a youtube search and you will find several videos on how to set up the a tub with vermiculite to put the eggs in, and how to set up the incubator.