A lot of very successful people started out with quite spectacular failures; here’s a few examples
This is a good video. Not mine, just found it on YouTube after doing some work with a client around fear of failure.
It feels a little incomplete without an erudite quote, so here’s a favourite:
“Our doubts are traitors,
and make us lose the good we oft might win,
by fearing to attempt.”
Shakespeare, Measure for Measure