I very much agree with kcott above. Perl has several good web frameworks...

I will be using Template because that is what is installed on the webserver and because that is what I am getting familiar with building another website. I started using templating very recently thanks to the good information and influence that flows from the Monastery. The website which I plan to refactor didn't exist 12 months ago as got put together in response to the Pesky Pandemic.

Technology doesn't directly have much to do with how effective your site is

Don't worry! I am well aware of that...
We have set about improving CRO which will involve incremental site changes. I want to refactor to make the changes easier rather than to increase the CRO directly.