++ for the good work, the code is well written and structured, not much else to add.

FYI though, the last item of @array is at the index $#array. This means that the two following lines are equivalent

my $high = @$array - 1;
my $high = $#$array;
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And the for loop could be rewritten as

for my $try ( 0..$#$array ) {
    say "--> trying at index $try";
    if ( $array->[$try] eq $find ) {
        return $try;
    }
}
[download]