Playstation Access has recently gone through how the career mode is going to be like in Project CARS. You can choose from three different type of modes. Zero to Hero, Defending Champion and Triple Crown.
All the cars are avaliable from the start and you will be able to race in different tiers. Zero To Hero is going from the lower ranks to the higher ranks. It's more of the regular career mode going from the bottom to higher up.
There are various different cars to choose from. You can also choose to play historical events aswell in the game. You get your own engineer to craft the car after your own needs. You can make it how you want to, and make the car win you races that way.
You can only play one tier at a time when you have chosen to play one. You get additional events with the schedule like invitational races.
Let us know what you think of Project CARS in the comments below.