You are looking at a very old, but free version of the course. If you are interesed the most recent version, check it out on the Perl Maven site.
It is always good to have a plan when you start working even if you are going to change your plans within a short time. If for nothing else if you use some version control you'll be able to see your progress. (What do you mean you don't have version control ?) Checking if the right number of tests were successfully executed is a test in itself. Some things that can go wrong if you don't check it: