new college student/major advice??

so I’m a relatively new college student, this is my first year and I still haven’t chosen a major. after doing extensive research, I’m seriously considering going down the health sciences path, first starting with nursing assistant, and with the goal of radiologic technology. Anyone have any suggestions or tips I should know before going for it? feeling pretty confident, but I’ve heard the TEAS and Board exams are hard. thoughts? advice? hype? I’m open 🥰