Furthermore, when you do reach the point where you could maybe call yourself “senior,” Perl will be only one of a great many programming-languages that you will have learned how to use over the course of a career that consisted of finding out what businesses need to do with their computers and then finding the appropriate way to do it. The fact of the matter is that any and every programming language is a tool by which to do a job. “Seniority” represents your experience level in solving that job in many different and more-complex situations, no matter what tool(s) you used to do a particular one.
My advice is that you should, as soon as possible, get a job in the business and do the best job that you can, whether that job seems large or small. Pay very close attention to the people around you. Do not be afraid to ask for help – in fact, very much the opposite. Likewise, do not inflate your own abilities: if such is to be done, let your peers do it for you. My first job in computers consisted of tearing pages off a line printer and shoving them through the proper slot. And that was more than thirty years ago.