Unless you have an incubator, a thermostat for the incubator, and something to set the egg in like perlite then there isn’t much you can do. Along with the fact that the impact from the car likely damaged the inside of the egg. You also need to make sure once you have the egg out that it doesn’t get flipped over by putting a mark with a marker on one side. You can try getting hold of someone that could try to incubate the egg, but chances are you won’t find one. Also, the image shows an egg that is very pink. It should be white. The shell isn’t developed fully so it likely isn’t to term.