No one says that you have to produce artwork for public consumption. I do plenty of stuff just for my own amusement and edification. What you see in this book, for example, represents about half of what I came up with; the other images are working files, experiments, or just too hideous for publication.
So share the stuff you’re proud of, keep the random experiments to yourself, and try to learn from your inevitable mistakes. Oh, yeah, and don’t beat the computer when it crashes.