HEllo,
When they are small nymphs they need some humidity to molt properly,
so try to keep humidity by spraying the cage twice a day.
Cage could be an old aquarium until they they outgrow it.
once they become adults you can keep the in a more airy cage.
Eggs from a sexual culture should hatch in 6-8 months
Eggs from a parthenogenetic culture hatch in 12-14 months
Bramble is a good food, you can also feed them Pyrocantha,Guava,Wax myrtle,Oak and definately Eucalyptus if you have acces to it.
FT