any help appreciated

im really getting frustrated with this, ive seen screenshots of how other people cars look in terms of shape, and they look really nice and proportionate but when it comes to anything i try to insert into the game, each car ends up being a different car shape, and ends up with the steering wheel going through the graphic
i would just like help on whether or not there is a specific shape to use or if anyone has better car shapes than the ones in the game from the start