The coursework covered in a full year’s worth of AP class in high school is a one-semester course in college.
with exceptions. e.g. Calc BC taken after pre-calc, Physics C Mech and E&M
Always keep a good supply of toilet paper. This is not something you want to suddenly realize that you don’t have.
Oh, and buy a plunger. This is something that you will want to have right away in the event of needing it.
I guess the take home message as far as classes are concerned is to not assume things will be easier because you have fewer classes per day or large gaps of free time.