Hey Joyce,
Congratulations on reaching the Aptitude Test. The Deviation Indicator test, with its two perpendicular lines, should be quite similar to the crosshairs of a Flight Director on the Primary Flight Display of any typical jet aircraft. You might want to set up your MS Flight Simulator for you to practice doing manual ILS landings. Here is a link from Youtube demonstrating how you can do just that.
YouTube - ILS Tutorial - Flight Simulator X
Try using a joystick, its loads better than landing with a keyboard.
For an extra challenge, change the weather conditions to something more extreme. Have fun!!
P.S. Remember to turn off the auto-pilot!