We all have self-doubt.
But then people tell you they love your work. They talk about you to their friends, and how fantastic your creation, lesson, product or service was.
The whole time you were terrified that nobody would like it, that they would judge you.
Just goes to show, you don’t always know yourself as well as you think. Often you are better than you might imagine.
If you just try something new and difficult, you might find that you are (or become) fantastic at it.