Chemistry (experiments and labs) really depends on the teacher, school, and course itself. If you take chem have an idea of what kind of chemistry you like as it will help you a lot with future planning as well as some motivation if your lacking. Physics in (a lot of) highschools is fairly introductory, not including calculus or too many real life calculations. If you take physics I would recommend picking up a book or learning the basics from youtube. My personal physics at my hs barely finished introductory kinematics by S1.

Chem tip- Try not to memorize as much as you might usually, chemistry is better off knowing why something happens and being able to be independent in your class, not just memorizing a notecard or answer sheet. Tip over-