Should you want to learn more about how a car works... Or, indulge yourself by learning its inner mechanics, but if you're just getting started and want an easier springboard, a car that's easy to work on is what you need. In other words, a good starting place would be wrenching and DIYing on a car whereby components are within easy reach. And, would allow you to more handily repair and replace stuff on your own, without much difficulty. Such vehicles include the Jeep Wrangler, where repairs and modifications can be done, even for a beginner. Similarly, another example would be the Subaru BRZ - if you want something sportier - where the aftermarket is plentiful, and DIY mods are easy to do.