Fitness will be a major factor in the first race and I think that will play into the hands of drivers who have been racing recently rather than people like me who haven't raced properly for a decade. I'am not one of the favourites to start with.
Since it's based on my parents it's more emotionally close to me than some of my more surreal plays. And then I like the balance of the comic and the sad. It should play as funny but you should care about the characters and feel sad for them.