What a real interesting thought exercise. First, I would enter therapy. I will need it because reality definitely will change for me and those within my inner circle. Wow!!!! A lot of responsibility. One could get lost easily if thought is given for the step-by-step of it all.
That said the big picture is I would assure siblings and their families I am sharing. Very, very close friends too within my inner circle. But, I would give deep thought how and how much. For instance lump sums contrast trusts. See what I mean by thinking about the steps by steps. Jumping ahead . .
Once all the fine points are out of the way I would go racing as a ProStock team owner with the National Hot Rod Association. I would work with them and have my own sportsman class car. We all would race at year long national events.
In between are those fine points like setting up trusts, investing, and donating to charities. Sounds like a lot of work to me said with a smile.