Having electronics repair as a hobby could prove to be practical as well as interesting
, as if you're good at it you could get a career as an electronics technician. There are online courses that will help you learn about your chosen occupation; some are free and quick, whilst others are more professional and informational, though they may require you to pay a fee before taking them. Taking a more intensive electronics repair course may be the difference between electronics repair being your job or remaining your hobby.