Currently there are no flt dispatch courses being run in KSA however there are a group of guys currently working on offering one in the future...not sure where they are with that right now however...
As for OJT, do your research on all available carriers, don't limit yourself to one locality, explore them all, not just DXB. You may have to offer your time for free but of course not everyone can afford it.
As for RAK Airways, they have been 'just starting' since 2006
D.O.G