The groundschool side of things has nothing that's in itself difficult,
BUT you will find generally there's a hell of a lot to cover in what will seem like not enough time.
Add to this the fact that you'll have to know it inside out to answer all those tricky exam questions. Plus the computer based training usually doesn't cover everything you need to know, so you have to start delving deep into assorted manuals and trying to sort out fact from fiction. Some autoflight systems and FMS can be pretty confusing and detailed to begin with. So prepare for two or three weeks of late nights and constant study.
Once into the sim you'll find it all comes at you fast - again a lot to cover in minimum time. Make sure you know all your flight profiles and calls beforehand, or you'll never catch up. Of course, in the real world you won't have had time to look for them because you'll have been too busy studying in groundschool. After each sim session you won't be able to review what you did, 'cos you'll be too busy again trying to prepare for the next session.
But amazingly you'll eventually find you're at the end of it all, doing your skill test, and hey - you've passed.
Then comes line training, and the learning curve starts all over again........
