At the risk of upsetting you and everyone else I am going to weigh in here because this discussion hits close to one of my triggers.
Too many people (maybe you included) define what they are good at way too narrowly and too tied to their original field of study (which we often pick randomly when we are barely out of being teenagers).
I don't even know you and I know that you are good with your hands, a font of common sense, and are a strong critical thinker able to analyze ambiguous and soft situations including things like emotion and motivation.
From what I have understood of your situation you are not trying to become a millionaire, just trying to have enough income to live independently.
I don't know how the social security system works in Australia so I may be off base here but my guess is you could patch together a number of part time activities that would add up.
Off the top of my head: Schools and universities need counsellors for their students; companies need customer service people (and many have found older people are better at the job because they are more able to understand what the customer is concerned about); Companies need people to proof read their instruction manuals for comprehensibility (hard to believe - but yes they do!); Publishers of all kinds need proof readers and editors; crisis lines and support groups need people to man them (mostly that is volunteers but not all); loads of small companies need folk willing to do a few hours a week to organize their offices.
None of the above are exciting careers and I am totally confident you could if you set your mind to it aspire much higher - but they are all jobs that need doing and can be done remotely and which I am very sure you would be able to do with one arm behind your back.
You are not defined by your degree or your narrow view of what you are good at.
Rant over. I will shut up now.