Hey there, like the others have said, it may be really helpful to speak to your school counsellor about your concerns. She can likely help you to skip the course/speak to your teacher or if that's not possible, work with you so you experience it safely.

However I highly doubt the content will be triggering as it's meant to educate, not freak you guys out. Phobias are definitely tameable! Many suffer from them but with psychotherapy and maybe medication, manage to lead fulfilling and normal lives.

Good luck!