Do a few dry runs especially the night sections so you are aware of your cars lighting, you may need to alter the suspension to get main to light the road up properley, If you dont get it perfect dont worry you can change the screen settings in the mini menu in race, its the EV settings.
Dont try that extre lap thinking your tyres will last, they wont and you will have a nightmare getting back to pits, again start the race and do enough laps to get a feel for it and see how long your tyres last.
There are loads of other things and im sure some guys will put down on here.
Have a good time and enjoy it, I did and ive done 5 now.