I want to compare an exaggeration using a simile. how can I do this?

Small mistakes, which were usually unnoticed by my audience, felt like I turned into an infant going to town on a keyboard.

This is the sentence, but I want to use a different simile instead of "felt like I turned into an infant going to town on a keyboard". Does anyone have any ideas on how to do this? for context, this is about me feeling nervous when playing the piano and how smaller mistakes seem so much bigger than they are to me. Thank you!