Then, learn the basics of analog electronics technology, and make clear the basic principles and circuits of transistors and field effect transistors;
Re-learn the basics of digital electronics technology and understand the basic principles of digital circuits. Let's analyze these circuit diagrams again.
You can learn and try. Your school may have an oscilloscope. Just buy a multimeter or something. When learning the basics of circuit analysis, you can go to the electronic market to buy resistors, capacitors, inductors, circuit boards, soldering irons, soldering tin and other devices and tools. Do some experiments, build welding according to the circuit diagram in the book, and use an oscilloscope to see if the signal is what the book says after electrifying.
In fact, it is not too late to learn this knowledge after going to college. Now that I'm interested, I'll go first. As long as it doesn't affect your high school study.