Imagine you've got a friend who has never ran a day in their life, and they say they want to run a marathon. Great! An awesome goal! But then they start taking about what specific shirt they should wear on the day of the marathon to reduce drag by some small percentage, when they haven't even started training yet. It'd be a bit silly, right? You'd probably tell them "Just start practicing today, and as you practice more, you'll know more." And you'd be right.