I think you want to look at BioPerl.

This code is completely untested. I didn't want to install BioPerl on my system. But it might work if you can get BioPerl installed. (I know you're new to Perl, so installing BioPerl might be a stretch, but this might help: http://bioperl.org/INSTALL.html.)

#!/bin/perl
use strict;
use warnings;
use Bio::Seq;
use Data::Dumper::Simple;
use feature "say";

# Convert the sequence to lower case.  Upper Case might be ok,
# but the docs for Bio::Seq used lower case, so let's go with that.
my $letters = lc("TTCAGGTGTTTGCAACTGCGTTTTATTGCAAGAAAGAGTGGAGGGGTTTCCA
+TGGGGCCCACCTCACAACCCACTC TTCACCCCCAAAATCACGCAGGGATCGGACTCAGGAAAGGGAAG
+CATCTGTGTGTTGCATACGAGCCCTTCCTGTACTTACTTCTTTCACAGCAGGGAAGG AAGAGGGAAGA
+GGCAGCTGTGGAGAGGATCAGGTTGCGGGAGGTGGGTATCTCGCTGCTCTGACCTTACGTACAGTCCTC
+CACAGAAGCATCAAAGTGGACT GGCACATATCGGCTCCCTTCACAGGCCACAATCATCTGTCTCTCCT
+TCGGGCTGGTCCGGTATCCAC");

#Create a sequence object.
my $seq_object = Bio::Seq->new(-seq => $letters,
                         -alphabet => 'dna' );

#Look for the ORF.  I specified the start, but I didn't see how to 
#specify the stop.  Are the stop codons universal?  I'm way out of
#my league here.
$prot_object = $seq_object->translate( -orf => 1, -start => "atg" );

say Dumper $prot_object;
[download]

Cheers,

Brent