Everyone's a beginner at something. I've only had one student with previous standup experience.
I stole a book about Zen from a chicken wing shack in Hagerstown Maryland. It taught me that one of the tricks to setting your mind to being open to learn is to contemplate what you're approaching today for the first time as a beginner.
For example, I'm a beginning headliner and writer's conference speaker. Before that, I was a beginning comedy teacher and joke writer. Now you're a beginning whatever-you-are.