Perl assigns no special meaning to new.

bless associates a hash* with a class, allowing $o->method to work.

package Class;

sub new {              # Or any other name you want.
   my ($class) = @_;
   my $self = bless({}, $class);
   # $self->{...} = ...;
   return $self;
}

sub method {
   my ($self) = @_;
   #...
}

my $o = Class->new();
$o->method();
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