You got a good deal on an awesome car.
Good for you and may you enjoy it for many years.
Keep it long enough and maintain it well and you may even be able to get all of your money back when you sell it.
Oil?
Doesn't go bad sitting and you evaporated any moisture out of it just driving it home.
Anything bad which might happen will happen while under warranty, so really no worries.
Change the oil as FCA recommends with what FCA recommends and you'll be fine.
There will be excess moly in the FF just from assembly lube and FCA may have factored this in their OCI recommendations. Were an early drain desirable, I'm sure they'd have no problems in recommending one on one of the most costly cars they sell.