I don't understand what you mean by the "rock" way. If you download the source to Moodle you can create a project that imports existing PHP code and that will allow you to start developing. Is English not your native language perhaps? Moodle is very international and more languages spoken the better
However I reccomend you start by configuring up your web server and PHP in such a way you can debug the source. Although I have always massively preferred Netbeans, I have been using Eclipse lately because the integration with xdebug seems much more stable (at least under Windows 7).
Instead of diving directly into generating new Moodle code, why not spend some time learning to create phpUnit tests which is an excellent way of understanding how the code works, and it can help other (potential) developers. Good luck.