beginner's luck
noun
1.
the initial good fortune or success commonly supposed to come to a person who has recently taken up a new pursuit, as a sport or game:
Catching a large trout the first time you go fishing is simply beginner's luck.
Origin
1895-1900
Idioms and Phrases with
beginner's luck
beginner's luck
Good fortune in a first attempt or effort, as in
I often use a brand-new recipe for a dinner party; I trust beginner's luck
.
[
Late 1800s
]