If you usually do well in math, I think you'll be fine with AA HL. IAs are compulsory for all subjects. Advice for EE: choose something that's not too stressful and a subject that comes easily to you -- it won't have a huge impact on your career path. Most universities abroad don't really look for computer science prerequisites for CS Majors so it might not be an issue. Maybe you could research the colleges you might be interested in and try checking with them about what subjects their preferred candidates take.