Hi, I'm new too,
Maybe you want to try some of my setup/setting,
Adjust the brake balance/bias, more rear a bit (still F > R), not too much front XFG is FWD,
reduce the steering maximum lock (if you get used with GTR 2/evo/raceroom try the value between 14 - 20, lower = understeer, higher = oversteer) and set controller wheel turns above 300 degree,
increase rear toe-in and widening the camber a little bit (F > R) for more stable rear after hard/quick turn at mid-high speed.
Don't brake hard when understeer, be careful when braking on bumpy surface at corner (adjust anti-roll, FWD: F </= R or F=0 R=0, RWD: F > R or R=0), then if the front tire is lock up please release the brake gently.
CMIIW