Easy -- even though it's not Presentmas currently, you can start with The Perl Advent Calendar. Plenty of snifty stuff on there.

I am questioning the wisdom of starting with CPAN, though. Lots of these modules are idiom-heavy, and idioms (in my experience) are hard on the beginner. Necessary, yes, but hard.

If you're going the learn-from-CPAN route, consider taking a single chunk of code at a time, un-idiomizing it, and finding out why it's that way. It's not that it isn't fascinating code, and it's not that it's not good code -- it's just pretty advanced.

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You are what you think.