Welcome to the Monastery Juan! May you spend many an hour here and increase you knowledge of Perl in manifold ways, finally giving back more to our community than you have ever received.

Now to your question.

I gather that you wish to create some dynamic web-pages. SSI is indeed one way to do so, but it is not the most flexible. As already said it will simply include the output of a script or file (which could be a Perl script or anything else which can be run in your webserver and provides output).

A much more useful, flexible and interesting way of making dynamic websites is by using a templating system such as The Template Toolkit (but there are many others) or by handcrafting your HTML through Perl and the CGI-module. Have a look at these and see how infinite the possibilities are for using Perl in the World Wide Web!

And of course the not-to-be-missed CGI-course of Ovid is a good start.