I was awful at the first game and never made it very far. I could use some community tips to make sure I don't have a miserable time, it's all a little overwhelming. Surprised by how quiet this forum is.
Oh, and to add my own I think I found an exploit. During the tutorial (before heading off in the car) there are no drains on resources, so you can max out cardio by running in circles. When you max out the first 7 stars you pick a perk, then you can level another 7 for max cardio. Only with your primary character though because you can't control anyone else in the tutorial.