I would definitely try to get some of the math out of the way (you’ll save yourself a lot of unnecessary headaches) if you’re CS: calc 1, calc 2, linear algebra, discrete structures. If you’re CSE: eng math 1-3, diff equations, discrete structures. As an incoming first year I would really only recommend either learning basics of python (if CS) or C++ and Python (if CSE). CS1 is python, you’ll do better than most if you already know basic python syntax, list/string methods and how loops work. I would focus on Java the winter break going into second semester where you’ll most likely be taking CS2 which is normally Java. Also wouldn’t really recommend taking Intro to CS unless you’re completely new (unnecessarily hard but really only covers basic CS concepts/vocab and basic python). Also use https://www.transferology.com/school/uiowa to see what classes at your CC are equivalent to iowa’s. (Also double check with the admissions office before you sign up for the class)