Driving safety training Where? Experience?

Hello and I want to do a driving safety training but I don’t know where is best / most intense: Adac/ Race management 110 …. Come from the Stuttgart area Have my driving license 6000km behind me for a year with my Ninja Zx6r 636 Bhj 2014 Need more exercise for curvature rides and there some people thought the best solution would be driving safety trainings. Hope you can help me with the final decision.