I Need help Making A Race Car Game Where do I Start?
Start with a Plan. Do a little research https://www.gamedev.net/start-game-development/ What platform will your game be on? What game Engine do you want to use? Do you know any programing languages? Choose the language that supports game engine. Design your game assets. Do more research https://www.google.com/search?q=search+for+how+to+start+game+development&oq=search+for+how+to+start+game+development
You should learn about game theory first, the mathematics, physics and other techniques... You can then apply this knowledge with any programming language you chose to work with
You need to start whit track and cars.