Huge +1
Many years ago, I showed my car in local PCA concours AND raced it in time trials, hillclimbs and autocrosses. I actually beat Dick Cotrell (may he rest in peace) who was a concours fanatic who regularly showed a beautiful 356 that was heavily modified in the "competition" class. I beat him because he I was actually racing and so got more points in the Zone 7 competition. Boy, was I surprised!
I never really aspired to win in concours. I just enjoyed yet another aspect of Porsche ownership and the people you get to meet. Go have fun with your car in a beautiful setting and see what you learn from the judges. More importantly, get ready to have many people drool over what appears to be a stunning car. And, if you're lucky, you might even go home with a neat trophy.