The absolute first thing I would do would be to get a safe deposit box and put the ticket there so i didn’t accidentally lose it or anything else dumb.
Then I’d go to a financial planner and figure out the best way to claim the money, how to maximize privacy, set up trusts. So, for example, when I go to buy my house and even if I’m known as the lottery winner, my house would not be in my name-it’d be in the name of one of my trusts or LLCs or whatever (that’s why I need the planner.)
Then I move immediately to a furnished apartment while I figure out where I want to have a house, if I want to build or buy existing.
Then I get a new car. Nothing fancy, but new.
I don’t have much debt, but I feel indebted to some people and organizations, so I would help them, either cash or gifts.
I have some civil legal issues, so I’d get a whole team of lawyers, experts, and PIs.
I never splurge on myself on material things, so I would go on a shopping spree.
I’d like to finish my degree and do some traveling. Maybe even do something like follow a band around for a tour in style.
I’d get laser eye surgery and a few cosmetic things (teeth whitening, see if I can get some scars reduced, etc.)
A day at a spa… mani/pedi, facial, massage, wraps and aromatherapy and hair and just total self-indulgence.
The neighbors of a family member are terrible. I’d try to buy their house to get them gone.