The purpose of practice drills is to fully understand, learn and then master the various aspects of the game of chess. Don’t try to memorize every part of the game, just try to learn and understand as much as you can.
Advanced players got that way by doing this. After mastering the beginning fundamentals of the game they continually play, read, study, learn and improve their skills and abilities.
With this in mind, try to enjoy the progress you will make in becoming a better chess player. The drills and review material are very similar to what is on the tests.