Day 2: It's been a long day without any progress
Day 3: Car became driveable. Handling is not yet nice and dosen't feel natural but it moves and dosen't flip all the time. While I knew that cars have a thing called swaybar to prevent them from flipping over I wasn't entirely aware that it is a must have in a virtual world. Then I scripted a camera which started to follow the car but it was quite jaggy at first. It took me a while to make it move relatively smooth. I've also created initial low poly car model with UVW mapping and painted some minor details but since it dosen't look good I'm posting it only for my future self ( here it it)
Here is my first unwraped UVW map with edged faces. An interesting thing I've found out is that it makes it easier to make a texture when you overlap both left and right side of a car and mirror half of top onto other half, then you just paint on both sides at once with a nice symmetry effect