Well, first of all, if someone has heard me and is paying me to perform for them, I must be 'good enough', at least to their ears ...
When I was about 15 years old and playing High School dances, when the girls started hanging out around the bandstand and smiling at me, I figured I was 'good enough', at least to their ears ...

I still get 'butterflies' in my gut whenever I go to perform, whether I am familiar with the audience or not ... and of course even more so if I know there are other musicians in the crowd ...

It was easier when I was with the band ...