Anything that's different from your own realm of experience as a human being whether it's driving a car or a boat or using guns anything that separates you from yourself and leads you more towards this character's existence is a big help.
If you don't have the story and the unfolding of the trajectory of the saga it's like getting in a car and not having any gas.
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I think you have to feel comfortable with your car. You have to go into turn one every lap with confidence. You have to be sure of yourself and your equipment.