Normal racing line would be to go wide, brake then turn in and accelerate out. Against AI however, they will overtake you from the inside with their cheat traction.
Second option would be to take the inside, brake until slow enough and then tap handbrake to slide into the turn and accelerate out straight. I did this on my Maserati GTS video 2nd race, first V corner at the start of the race.
Those two are the basics without going into tuning the car. How fast and sharp you can take the corner can be tuned through suspension and differential, but will make the car more twitchy. This is more important on very fast S2 and X class where grip is not enough to correct understeer, like this week's weekly challenge to race my S2 Ferrari where I have to tune it to make sharp turns for circuit racing.
If you want to tune cars to your liking, try this calculator:
https://www.forzatuner.com/
It gives decent tunes that are better than stock cars.