Coding is a language that can be spoken and written.
To help visualize the processes in a computer u need only imagine it as a story that is written line by line. As in writing each word is made of letters. those letters in computer science are called bytes. Those bytes are a physical thing that the computer stores. when the computer is running code it takes the letters as a command. The command is line and when you program you must tell the computer a story. Now is a little confusing, but once you understand the fundamentals you will be able to see how it all comes together.