The process is pretty easy. You can search motorcycle sag in YouTube and find tons of videos.
Fully extend the suspension then measure from a point on the rear axel to a reference point on the tail. This is measurement A. Have a helper hold the bike upright and push down on the seat and let it rebound up. Measure from the same point on the rear axel to the same point on the tail. This is measurement B. A - B = static or bike sag, you're looking for this to be between 10-15mm. Its probably 0mm now. Get on the bike and have a helper measure from the same point on the axel to the same point on the tail, we'll call this C. A - C = rider sag. You're looking for this to be 30mm.
Some methods would have you get on the bike and extend the suspension and record that measurement, then compress it with you on it and record that measurement and the average of those two would get subtracted from the fully extended measurement. On the Panigale I don't like that method for the rear since lifting on the tail causes it to flex. Not a huge amount but we are talking millimeters here. When taking the fully extended measurement, with the bike on the kick stand, I stand on the left side with my left hip against the bike and my left foot near the kickstand. I pull the bike up and toward me, leveraging the weight on the kickstand. This will very easily get the rear tire off of the ground and fully extend the suspension.
With your weight, you should not need to change springs to get the sag you want. 30mm rider rear and 40mm rider front.
Front is easier than the rear since you can just measure the extended fork tube. If you have a base V4 the preload adjuster for the forks is at the bottom.