How to code a PhoneGap/Cordova application

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I am starting with PhoneGap but I am totally lost : I followed the getting started tutorial, so I've got ADT bundle (android SDK + eclipse + ADT plugin), i used create.bat in cordova to create a default project and I can run it on my device from eclipse.The point is that the tutorial stops there, and in the default project there isn't any HTML/JS file, everything is java/xml like a normal android project.So i made a new project from existing sources and this time I used PhoneGap (still don't understand what the heck is the difference with Cordova and if I need both or not) so I selected the "example" folder in phonegap for my existing source.Now I've got a project with some jar files, but also an assets/www folder with index.html and main.js so this seems fine to get started : the point is that I can't find any tutorial for android which explains how to build an app from that.Also, Ecplise opens index.html in a kind of WYSIWYG view (without editing) and there isn't any switch to html code editor.Do I need to install Eclipse Web Platform or anything ?And please can someone here who understands all that more clearly help me out ?Thanks