Put it all in a mix of a worldwide stock and bond index, look up the suggested distribution fitting youe age, probably like 60/40, then take a supet conservative take on the trinity study which suggests a 4% safe withdrawal rate and make it 2%. This puts you at 160k per year. In virtually every circumstance, you can reasonably rely on spending this amount annually, adjusted for inflation, and not run out of money, same with your kids after you die.
Is this enough? Then you may retire, if you don't like to work, or switch work to anything else regardless of pay. That is a personal question, talk to your family mostly, and experiment. Volunteer, travel, sabbatical. Take it slow, don't rush. Like something? Build it out gradually, but don't change overnight. Most people don't enjoy permanent vacations for example.
Donate part of the 160k annual budget as you please.
Hire a wealth manager for a few sessions for advice. But managing it yourself is easy if you stick to simple strategies. No need for exotic investment products or a manager.
But, do hire an accountant. Understand your tax obligations first and foremost.
That's your base. From there you can breathe and think about bigger plans.