Go to your GP, tell him you think you may be autistic, and ask for a mental health plan.
Complete the assessment for mental health.
If you suffer from anxiety, depression, or other disorders related to autism, this should be easy.
You will get 6? subsidised visits to a psychologist, make sure it's a psychologist who specialises in autism diagnosis (Minds and Hearts in Brisbane or clinic of your choice.)
I ended up paying around $60 a visit.
It cost about double that for the report, so about $360 for everything.
Make sure you tell them from the outset that you're seeking diagnosis.
Alternatively, some universities offer diagnosis as training for psychology postgraduate students for free.
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It's like I'm sleepwalking