What are you trying to accomplish?

It seems like you might be better off learning one tool at a time rather than trying to mix the two together without proficiency in either. Naturally I would favor learning Perl first, and then layering in other tools as you need them. After you've gotten comfortable enough with Perl you will be able to keep it straight while learning your way around another tool.

But whatever your process for mastering these tools, the first question still stands: What are you trying to accomplish?