If you want to get into cars, it should be an organic process, and not forced. Start by learning more about how cars work, in addition to the many nuances of the car world to form a solid foundation. Usually, reading books or watching YouTube videos on cars is a good way to start. While you're there, consider attending car shows and car meets, and have a chat with others about your budding passion. The would-be catalyst to you getting into cars would be seeing and experiencing them in person. Once you've nailed down what sort and genre of car culture suits you best, you could then get a car of your own and spend time working on it and driving it.