you're doing good, nclex questions are like saunders; simple, straight forward, entry level. take your time in answering the nclex questions, it took me two hours to finish 75, and memorize the infection control mnemonics.
go with saunders, nclex questions are entry level, no need to go hard on yourself, questions are very straightforward one tip, study the allnurses notes study guide, especially the mnemonics for infection control, good luck