This guide intends to get you started as an Ignition Module developer, but isn't a comprehensive manual.  If you run into a problem with the SDK, or aren't sure how to accomplish something, the module SDK forum on the Inductive Automation website is the place to go! The forum is visited by a wide range of users who have experience building modules, and it is frequently checked by the IA development team.

For more general questions with Java, Python, Ant, etc., the internet has a wealth of resources.  StackOverflow.com is a particularly good place to ask questions, though you generally can't go wrong typing nearly anything into Google.