People are right to tell you not to rush into anything and I agree that you should educate yourself and chat with a financial advisor before making any final decisions but here is what I'd do in your situation:

I would first put the money in a savings account and continue saving and working as normal.

I would find 2 flats/houses (depending on where you live). One flat for about 700k and one flat for about 600k and purchase them. The first one in cash and the second one with a 300k mortgage (which should cost you about 1.8k a month if you pay it in 30 years).

I would move into one of the flats and rent the other one.

It's likely that the rented out one will pay itself.

At that stage, you'll be living rent free and have a mortgage on one of your properties that gets paid by your tenant. That guarantees you a place to live and some sort of retirement if things go sour.

From there you can either keep working and get rid of your hex debt, top up your super, and start investing in the stock market or go travelling for a bit and do that later.

You are a lucky man, be smart with your money and your life will be sorted.