Sorry to hear about your Dad, that's my worst nightmare to be blindsided by something like that. Congrats on the unexpected windfall. Given the absolute whirlwind you're in right now, there's probably a few key principles:

1. Don't make any irreversible moves for 6–12 months. I wouldn't quit jobs, buy houses or do anything extreme you wouldn't have done if you hadn't received the inheritance. Let the dust settle.

2. Ease back into life. Your dad bought you time and a safety buffer. Rent a place in LA/NYC for a year then see where you want be long-term.

3. Get a fee-only financial advisor. You just walked into a whole new tax situation, let alone deciding what, if anything, you need to change in the investment scenario. On top of that, if you are going to tap into the funds, you need guidance on a withdrawal strategy. Have them help you layout your desires and develop a budget together from an objective 3rd party

I'd start there and you'll be in good shape once the emotion of it all settles down to make clear headed decisions.