Find out the book your school is using for first year, it's likely Stewart's 'Early Transcendentals' Calculus or possibly Gilbert Strangs book (my online school

Find out the book your school is using for first year, it's likely Stewart's 'Early Transcendentals' Calculus or possibly Gilbert Strangs book (my online school used it for Math 101) https://ocw.mit.edu/resources/res-18-001-calculus-online-textbook-spring-2005/textbook/ https://ocw.mit.edu/resources/res-18-001-calculus-online-tex... with the bonus of Strang's book being Calculus is explained in the first chapter and the entire rest of the book is just exercises and applications. Go through all the exercises, looking up the things you don't remember in the rest of the resources mentioned here already. Maybe your school offers some kind of advanced placement and by doing this you can also skip a semester of single variable calculus saving yourself tuition costs.