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.)
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
#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;