I'd ask around, you might find one or two airlines who would be prepared to offer you a day or two's observing in their Ops rooms. I have always found that ex RAF movements or ops bods have caught on very quickly and the transition is not too difficult. Civil regs, JAROPS1 need understood and our operations manuals follow a , more or less, common format under JAR.
The content of the ICAO course is the technical fundementals of the trade, much of which you'll be familiar with I am sure. Getting familiar with the commercial aspects of the job come in time as will crew flight time limits etc.
Good luck.