Well, I would say no way of knowing what u r going to struggle with
.. Better not to know than be confused and stressed. Generally, it is simulation of part of what ATC work is (or what used to be), kinda multitasking. U will have plenty of time for reading instructions and for practicing. You will work with electronic strips and change data according to instructions (voice) and search time-conflicts in strip bays. No way u can prepare for it unless you are good software engineer and willing make similar game
