[Zope] Newbie needs suggestion

Hi list. I am a Zope newbie. I am a C++/Python programmer and web programming is completely new to me. I want to create a web based mail client, where each logged in user would have his own folders, but there would also be some kind of global folders, where everybody would place messages in it so that they can be viewed by all users. My problem is the simplest and the most common newbie-oriented problem: And now? Where am I supposed to start from? Thank you all,, in advance. Regards, Stavros