"I may have to add a page or two again within a year or two, so looking ahead I want to use something better and newer than 'use CGI' and print."

It sounds like this old app is still doing what you need for now, perhaps the easiest way forward would just be to copy an existing script as a starting point. Using templates is wise, however if you are looking for something long term see CGI::Alternatives. Personally I recommend Mojolicious for making web work fun and easy to get right.