here are some tips that you should but don't have to do
The first car that you will get is an Audi
Just use that one for a while
There are a lot of cars so save up your credits so you can buy fast cars
There are a lot of festivals and R&Ds
You should compete or race in those because you get great rewards
Like you might get a full nitro or the car you drove in those
You should practice practice practice
If you press the botton that says more racing options it will lead you to a few bottons press the one that says quick solo race press that.It should lead you to a place where you can choose what type of race you want.If you choose the mode knockdown then you will have to compete against another player to see who can knockdown the most players.That is a great type of race to practice knocking down other players.
You can buy it wherever you buy apps.