Hey
Well done so far. If you have logged enough hours on FSX! it shouldn't be a big deal. The sim check should only assess your hand-eye co-ordination or pilot aptitude. They won't expect you to fly like airline captains or to apply airline cockpit procedures. You should usually be given a brief on what is expected of you: medium and steep turns, turn onto heading ... , descend/climb to this altitude.
Just remember that attitude controls speed and power your rate of climb or descent. I would suggest you learn the very basics of flying manoeuvres (practical part of it). PM if you require additional help.
All the best.