Hi @Alyce,
talking to to others on the forums is a good place to start. Learning as much as you can about the illness is also important. There are some good resources here at Sane. Depending on which state you live in, you may also be able to contact Carers Australia who often provide support and understanding, including networks.
I have a teenager with with schizophrenia and psychosis is not a nice thing to watch. Not communicating or talking about the condition is also common. Be there for your partner. Listen, don't judge their behaviour, but also look after your own needs. You can't support them if you don't look after yourself.
I am am lucky in that as my son is still a minor, I have some access to his treating team, however any discussions he has with his psychiatrist or psychologist will only be shared if my son gives permission.
Take care