Another tip is to clear your life for the entire period of your sim training and groundschool. If you allow yourself to get bogged down in domestic stuff or distracted with things that aren't THAT important, you will not do so well in the sim.
If you think it would be better for you to be away from home for the duration, in a hotel or B+B, then book it.
You may think it is not a problem, you won't let it become a distraction, but people do and then their performance is not so good.
You really need to commit yourself 110%.