|There's more than one way to do things|
Yes, matze77, in the Tutorials section there is an abundance of interesting and challenging reading and examples, and as always, you can download and tinker with the code to watch it do different things. :-)
Also in your meanderings check out Cool Uses for Perl, many things to be learned there as well...
As mentioned above, the Llama Book exercises are plenty challenging and they can be expanded as well.
Remember, use warnings; & use strict; are your friends!!!
When you get stuck, the debugger will come in handy to show you what is going on inside the script, which is usually NOT what you wanted to happen! :)
"No trees were harmed in the creation of this node. However, a rather large number of electrons were somewhat inconvenienced."