I picked mine up without a test drive in advance, by the time I got home, 20-25 minutes, I was totally dialed in the center display, throttle, brakes (including regen), steering feel and had my mirrors sorted out.
I'd echo that numbered list by
@jjrandorin, especially the safety items like lights and wipers - and you can do many of those things just sitting in your driveway.
Also, a +1 for the folks saying to drive it in chill mode. Even if you are coming from a performance vehicle, the throttle response is __much__ different. I say chill not to reduce the performance, but since the throttle is so immediate, almost like a switch, you'll find yourself kind of pulsing the car and that really gets to passengers, especially if they're prone to motion sickness!
Congrats, these cars are amazing, I've had mine for nearly 3 months, and it still floors me.