Learn and know the basics. All electronics is made up of basic electronic circuits.
It is when you mix circuits together that they become harder to understand. When you put circuits together to make a TV or radio or computer that understanding electronics becomes successful.
Use your understanding of how electrons work to troubleshoot circuits that are not working correctly.
It is when troubleshooting a problem that is hard to fix that electronics is really fun and exciting.
When you finally repair a hard to troubleshoot circuit is when your understanding really pays off.
If it were real easy it would be boring. Have Fun.