If your university has a law faculty they might offer limited legal advice from current students for free or a reduced fee.

In the UK, free speech is not possible either. See D-notices, and later super-injunctions to stop media and individuals reporting on facts.

Please provide examples.

Free speech isn’t a constitutional right in Australia

https://humanrights.gov.au/our-work/rights-and-freedoms/freedom-information-opinion-and-expression

I am not very well versed in Australian law, but this indicates to me that free speech is indeed protected in Australia.

Lauren Southern was banned from the UK?

https://en.m.wikipedia.org/wiki/Lauren_Southern

She’s a far-right racist conspiracy theorist nutjob who was denied entry into the UK for spewing hatred. Her right to express herself ends where other people’s rights for freedom, health and safety begin.