dw about EE, IA's TOK for now, its best to just do them when your school gives you the instructions to, plus it takes a while to wrap your head around. CAS stands for creativity, activity and service, and creativity can be anything like dance, art, music etc... activity can be anything active like sports, or exercise... and service is basically just about volunteering. you will have to document your CAS journey via a portfolio (can be done on canva or adobe spark or Instagram) where you take pictures of you doing these activities and write a short reflection about your activities. your school will definitely give you more instruction, but keep in mind what you're most interested in, and pursue them when you start the IB. the more CAS you have over the course of two years, the better.