I would start by consulting with a wealth management specialist. Someone in my family does that for a living, for a top Wall Street firm, so I would go to her. I’d set up a trust, or several trusts, to protect the money from creditors and predators.
I’d also change my Will, to reflect the new changes.
Then I’d look into giving some away to needy friends and family. I’d make a list of who I think should get some – maybe one million each for the closest 10 people, and less each for a few more. After that, I’d think about what I want to do with the rest of my life.