Set everything to even. Roll bars front and back even, springs the same, etc
If it understeers the front is too stiff
If it oversteers the back is too stiff
If it skids and slides it is too stiff overall
If it feels like a boat your rebound is too low
Take that, play, play, and play some more. Learn one area of the car at a time when you are playing. When you have a grasp of roll bars move to springs and learn it. Just keep playing with stuff.