There is no Type Rating Course for DEC in Ryanair. Only for Cadets.
DEC run only OCC and they do not wait more then week to start line training. Mostly one week wait is necessary due to STN being only base for DEC line training. Few, very few went to DUB.
Cadets wait up to three weeks due to priority for DEC. Also Cadets go to many diferent bases for line training, but waiting time is longer.