Drive it stock to see where it can improve.
To much understeer/oversteer ??
Install a FC Suspension and a LSD.
Maybe Sport Softs can help in the first place.
LSD:
Initial: 20-40
Acc: 30-40
Brake: 10 (if you like a "looser" rear while braking)
Susp:
Camber: -2.5 / -2
Toe: -0.20 / -0.15
Ride Height: Front a little lower then rear (don´t minimize the height)
Springs: 12.5 / 13.5 (I like it hard

) => steers a bit better if the front is softer
Dampers Compression: 4 / 4
Dampers Extension: 9 / 9 Extension schould be higher then compression(7 / 7 is good too just try a bit)
Rool bares: 4 / 4 (rear maybe 5 to get a bit more over- than understeer)
Try it and tweak as you like.
Maybe reduce some weight after that or increase the power its up to you.
I drive the Cars stock first to see what can I do to make it better.
Some Cars don´t need tuning at all; example Trial Celica.
Have fun