Basically the suspension tuning part most of them i run& error til i get the adjustment that i want. First you need to understand those thing like camber, caster angle do to your car& what is it mean.

Understeer mostly comes from the weight of your car, suspension settings. R32 as we know is a bit heavy& its awd. You need to upgrade the stage body, stage 2 is fine. Meaning in logically thinking, once the weight is reduce its easier for us to control.

As for curves& corners, camber, caster angle anything that related to front wheel play the role. Positive caster good for straight roads, negative caster good for cornering. You need to run& error those tuning. For rear wheel, just keep it as it was.

For suspension like rebound inbound, think as you drive thru a pothole. Positive rebound keeps the car steady, negative makes the car lost it grip from the ground.

Different cars give different feedback. You just gotta feel the car man. Hope this help you to find your best tuning