Mainframe programming

I was wondering; what steps do I need to take in order to learn how to be a mainframe programmer(if that is what you call the occupation)?

>>10
I recommend reading the OpenCOBOL documentation and searching for code examples on the Internet. That's how I learned COBOL.
Make sure that you learn the original COBOL and not that new OOP one, since all existing code is in the previous and you won't get a job otherwise.