What classes should I take to become a firefighter
Here is a local academy in San Francisco where you can get more info: https://www.ccsf.edu/academics/schools/allied-health-physical-education-social-services/administration-justice-fire-science-department/ccsf-fire-academy
Here is a local university which offers an emergency management degree: https://www.usfca.edu/public-safety/disaster-preparedness
I recommend leaning on advisors for more info but this is a good start.
Hope this helps, best of luck and keep us updated on your progression.