Take a few courses on electronics through a university or local community college. Community colleges offer these courses at a discounted price. Taking a class will give you proper instruction on how electrical current works and how you can determine whether the transistor is the problem with home appliances or gadgets around your home.
Gain real world experience with transistors by applying to be an apprentice to an electrician. Apprenticeships are commonly found through local electricians. These positions are also known as internships or helper jobs. You can find them through the career center at your university or community college.
Work through your apprenticeship for a minimum of one year. Most companies won't hire apprentices without a degree until they have interned for at least one year. Make sure that you're spending your time getting as much practice and information as possible through your boss.
Apply for jobs with companies that either manufacture or repair electronics. Brush up on your interviewing skills and update your resume. Tailor your resume so it highlights the skills that you learned from the courses you took and the apprenticeship.