I think that they are sufficient analogies. But, the heart allows the organs to remain healthy and active. The motherboard does not fully fit that classification. The motherboard would be more like the spinal cord or nerves.
From January 2005 through July 2017, approximately 853 million electronic data records in the US were breached.
This allowed the attackers to take control over people's personal data, such as their various credit card numbers, and other important data, as well as their addresses, etc. The cyber police, as well as the regular police have been working hard to stop this from happening, but the hackers are very strong and smart.
You should check out courses in areas like Computer Science and Technology Repair. You'll most likely find what you need with a quick and simple Google search. Good luck with your career!