Starting from $0 ($1,000) at 31

This is embarrassing but I am choosing to own it and move forward. I know it is not legal to give financial advice potentially even through discussions online but I thought it was worth a shot.
Basically I am a recovered addict. I used to work in finance as a mortgage broker, e-commerce underwriter etc. but I fell into bad habits and although I was working since fourteen I was never able to save due to ADHD/CPTSD. I’ve earned well over $600,000 and have nothing to show for it. Now recovered and diagnosed I am 31 with no super, no real expenses as my family is comfortable at the moment. I have $1,000 to my name personally. My income is only $1,000/fn until I start working. I am lucky enough to be on a disability support pension due to… horrific circumstances.
Currently unsure whether I will study financial services further and growing up I always imagined I would have my own business (I see the irony).
I am wondering, as I am in the dark on

1. Would be wise for me to start a superfund to make sure I am insured if I get a terminal illness or something bad happens out of my control.
2. What are some smart investment options for someone like me.

I can’t afford to be stupid anymore. My father has paid off his mortgage but is married to a disgusting woman so it is doubtful there would be any inheritance. I help my mother with her $100k left on her mortgage as best I can & we may inherit at $500,000 – $1,000,000 house on my mothers side in the near future (grandfather) but I don’t feel right not having my own future and nest egg as my mother will need support in the future etc.

Does anyone have any insight in what would be smart to do starting from zero at 31.

Any help would be greatly appreciated.
Thank you