I just had to hit F5 one hundred million times over the course of two months and voila my vehicle went into production. I think that's the trick.
Seriously though, I found out on the website. No one let me know. Production is 4-5 days. Delivery is highly dependent on your location. My transit time was 2 days, then they prepped the car for 2 days until delivery. You're in California so I'm guessing your timeline will be similar. Since you already have a delivery date you can work backwards to figure out your approximate 'in production' date. Probably later this week or Monday at the latest. You're getting close for sure.