Many of the coaches in Rocket League Coaching Discord have told me in the past that play style really does not start forming until you get to around Champion rank. If you know your play style than you can match the car that best fits your style and your skills.
The problem I have with this statement especially if you are new to the game is you probably lack the hours or skill set to really know what your play style is. If you have checked out other videos or looked around at other articles most players will tell you it comes down to personal preference.
1 Determining the Best Car in Rocket League.