Once you signed the contract, a few days after you get the roster for training plus online pre learning courses. Focus and pay attention to the Uniform video/pdf as what to wear with what and what is not allowed (need to know all capusls (outfits) not allowed to say male/female anymore. Also pay attention to the video/pdf of how the avionics and other (drag, lift, pressure) work of an aircraft. This will be examined the first few days of start of training. Perhaps you forget it, if you already do these online learnings 2 weeks prior of start of training.