A Computer Hardware Engineer has a wide variety of choices. One of the new areas of computing is the IOT (Internet of Things), which is just another term for all things can be connected to the internet and create data. This very quickly growing area includes Home electronics gaining intelligent interfaces, like your alarm system, air conditioning, refrigerator, general appliances and home services. All of these have computer hardware that has been engineered for the specific purpose.
A good area to start your budding interests are with small computers that you can build and create new things with like the Rasberry PI or the Arduino computer.