The main thing is to manage trafic, it's nothing like the road.
You can learn it with SimRacing online. iRacing is the best place.
As soon as you'll get a bit faster. Like having mostly good lines and braking points, you'll need pads and fluid.
If you feel the tires are loosing grip, you need stop pushing for cooling them down. They are not supposed to be driven hard for more than maybe 3 laps.
Go on track, that's the point of driving this car.
You will learn so much.