Congrats on the new car.
There are a number of fluid that should be changed, here are some excellent video tutorials on how to do them.
Rear Diff:
https://www.youtube.com/watch?v=aR0t...&index=16&t=0s
Haldex / AOC:
https://www.youtube.com/watch?v=uZNC...&index=17&t=0s
Angle Gear:
https://www.youtube.com/watch?v=2YFD...&index=15&t=0s
Gearbox oil:
https://www.youtube.com/watch?v=EAb9...&index=11&t=0s
I will be doing all the above plus the fuel filter on a friends 2014 XC90 D5 shortly.