Getting started on something is always the most difficult part. And fear, especially fear of failure, can be the biggest hurdle to overcome. We hold ourselves back, but if we would only try...!
I'm very guilty of that kind of thing. But here's a cute poem that actually has an excellent message - to be brave, and try :-)
How The Little Kite Learned To Fly
"I never can do it," the little kite said,
As he looked at the others high over his head;
"I know I should fall if I tried to fly."
"Try," said the big kite; "only try!
Or I fear you will never learn at all."
But the little kite said, "I'm afraid I'll fall."
The big kite nodded: "Ah, well, good-bye;
I'm off"; and he rose towards the tranquil sky.
Then the little kite's paper stirred at the sight,
And, trembling, he shook himself free for flight.
First whirling and frightened, then braver and grown,
Up, up he rose through the air alone,
Till the big kite looking down could see
The little one rising steadily.
Then how the little kite thrilled with pride,
As he sailed with the big kite side by side!
While far below he could see the ground,
And the boys like small spots moving round.
They rested high in the quiet air,
And only the birds and the clouds were there.
"Oh, how happy I am!" the little kite cried;
"And all because I was brave, and tried."
From Harry Golding's book Verses For Children