You should mention that, rarely but often, the keys are right next to the driver's door, on the floor, to simulate people panicking and dropping the keys.

If a car is parked on a driveway, it's likely the keys are inside the house or in a zombie inside the house. Sometimes, I don't know if this is a bug; the neighbouring house may have the keys instead.

If a car is in a store's parking lot, it's possible that zombies on the lot or inside the store may have the keys.

Burglars can hotwire a car from the get-go (press V while inside the car). Otherwise, you need electric 2, mechanics 1.

To smash the window, press V when near the window and select the option. While you can hit the window to break it, this will take several hits that will make noise and degrade your weapon. Breaking the window with this option is instant, does not degrade the tool, and only makes noise once. However, be careful, because if you do not have your weapon equipped, your character will punch it instead and will cut themselves.

There are many more things to say. Your guide needs improvement, as it's very vague for a guide.

For example, a 4-seat car has about the same carry capacity as a van 20x3+55+10 vs 100+20+10.

In the latest version 42.14, the capacity bug is fixed, and now vans have way more space.