Not sure for tmc, but I went to maverick with experience and it was optional to go with a trainer. If you have no flatbed experience it would be wise to do Atleast securement training
With TMC you will go out with a trainer if you have no flatbed experience , can be from 2-4 weeks just depends on how you do. the trainer is not there to teach you to drive but teach you the TMC way of doing things and securing loads.