How many quality sources do you need? There are several good beginner books on Perl, the learn.perl.org website, the beginners mailing list, and many places to ask Perl questions. Both perl.com and perl.org link to these resources, and they show up in a lot of answers.
I've heard this one long time ago :
It's enough only when you are being punched.
I also dont see a reason why there shouldnt be more sources? Anyway could you imagine living in Serbia (or any similar country)? No I don't want to start talk about all shitty things like wars and whatever. Problem I faced is that there were (virtually) no credit cards and only book I could buy here was - Perl : The Complete Reference which isn't really for the starter ...
Lots of people have a hard time learning any new subject, but that's because it's new. Think of it like driving in a city you haven't been to before.
Yeah but it's much easier if you have a map of the city ... a detailed one is even better, you know, one that shows which streets are one way (and in what direction) and stuff like that.
I agree that some things we simply need to learn on our own (the harder way) by making those same mistackes.
As I said in my first reply, there are people who do things, and there are people who talk about things. Which one are you going to be?
Well if everything goes right, my first article is going to be published on perl.com. Further, I plan to start (yet another) perl site - targeted especially to beginners. Thought about it for a long time but I couldn't find enough time ...