My daughter graduated from HS with an associate's degree and her pharmacy technician certificate (CPhT). Her high school HOSA team went to nationals two years in a row.
The minimum I'd have her look into is her school's HOSA club.
My daughter first wanted to be a Pharmacist (that's why she took the CPht classes)... but by the time she graduated high school, she changed her mind to dermatology. High School programs like HOSA and 'Career and Technical Education' programs are a great way to get started and point you in the best direction (Our school district has JTAC.. each district has its own program).