Hi @2026 its a very difficult but unfortunately common situation for parents to find themselves in.
As you have probably learnt, unless there is immediate risk of harm to self or others, he can't be forcibly treated and needs to seek help himself.
You are obviously doing all you can, as is evidenced by getting a mental health plan for yourself to seek advice.
Perhaps keep the lines of non-judgemental communication open and learn as much as you can about psychosis, since knowledge will help reduce your own anxiety about it and you'll be in a better position to support him if he does reach out for help.
Some links:
If he hears voices, a good lived experience (non-medical peer support) resource is:
There are other groups in some States if you need.
Crisis info is at
In particular, you can talk to your State based mental health triage team for advice (under "State and Territory Crisis Support Numbers at the link above).
Please let us know what other supports you need.