CS- experience necessary?

Hi! I’m a current high school junior who’s thinking about getting into CS. However, I’m not sure if I’ll be able to take AP CS or a related class at school next year- would that be an issue if I’m planning to major in CS later? (I have some, but not a lot of, coding experience). What else should I be doing to help my chances of going into CS?

http://talk.collegeconfidential.com/math-computer-science-majors/1957753-programming-knowledge-before-entering-cs-major.html#latest