Advice for ACT test - International Student

Hi,
I’m an international student from a country in which the ACT and SAT tests are not offered. therefore, I should do my best on my first and last attempt, and I want to register for the October test. (I’m studying for the TOEFL test simultaneously) I’m completely ok with the difficulty of questions of the ACT, under the time limitation I answer 7-8/10 each passage of reading section and with some extra time 9-10/10. (they’re for my first practices)
in addition, I’m highly motivated and going to do my best. I’m very good at math, too.
I don’t know which vocabulary book I should read, I understand most of the reading but can’t understand some vocabs and as far as one question wrong in the ACT is equivalent to one point reduction in your section score usually, I’m going to learn as many I can.
To guarantee a 32+ score in the time restricts, please give me some advice.