by Jose Navas.
Hi Maria,
I think you may check:
From my experience, try to delve into the moodle source code may be a little bit daunting, but you could delve into more slowly by studying how to create a module plugin, or a new theme, those two are things that get practical value for learning organizations.
If netbeans is causing trouble you may try Notepad++ which is pretty cool too.
Best regards