His mind is relevant. That's a big enough clue. When you invest a billion in a business and let someone with no education or experience run it, pm me. He's not just a GM trying to build a team, he's the CEO in charge of Business Operations and everything else. Not too shabby for a guy without even an Associate Degree.
And if he is a smart guy he will set himself up as a face of the franchise guy who does interviews, and has a role at the top of the org for baseball ops, but largely hands off the business ops ends of things to others.
Best thing about Jeter in Florida will be him raiding that Yankee system for baseball talent. Yankees have done an amazing job rebuilding their team from top to bottom of the farm the last 5 years, and it is likely Jeter will try to raid some of the people behind the rebuild