I wonder if it's possible to compose your own song if you've never done it? Where should you even start composing lyrics if you are a complete zero in this business?

To begin with, you need to think of a theme for the song you want to make, and then already start composing rhymes. True, you may not succeed the first time, but with time you will succeed. And to give you an opportunity to master this skillset more easily, try to start composing your first song with this ai song lyrics generator https://jadve.com/tools/ai-song-lyrics-generator .