For all DIRCOM/DCO officers, you must complete the two week DCO Indoctrination Course (DCOIC) at Newport, RI, usually within one year of commissioning.
For IW, the next step is the 11-week Information Warfare Basic Course (IWBC) at Pensacola, FL, within two years of commissioning. There is no option to take this course in a "drill weekend format" like there is with the basic INTEL curriculum.
Next comes the IW Officer Personnel Qualification Standard (PQS), which happens via your unit. This must occur within three years of reporting to initial IW assignment or obtaining TS/SCI clearance, whichever comes first.
For IP, you must complete what I believe is now a 5-week Information Professional Basic Course (IPBC), the first two of which are shared with the IWBC curriculum, within one year of commissioning.
Similar to IW, the IP Basic PQS must be completed within three years of commissioning.
Now all IDC communities (INTEL, METOC, IW, IP) also have IDC common core PQS for the Information Dominance Warfare Program (IDWO). This must be completed within five years of commissioning for reserve IDC officers.
Everything past the initial IW/IP Basic Course are all things done on your own time and/or via your unit...some units may handle quals differently, and I'm not sure about how everything works. Hope this information helps.
A lot of this information is found here:
Program Authorization 206 - Information Warfare
Program Authorization 231 - Information Professional
OPNAVINST 1412.13 - Information Dominance Warfare Qualification Program