The requirement is very clearly defined. Here is the rule:-
9 FAM 42.33 N7 “HIGH SCHOOL EDUCATION OR
EQUIVALENT”
(CT:VISA-1768; 10-31-2011)
The consular office must adjudicate the applicant’s qualifications under this
requirement. In order to register for the DV program, the alien need not prove
that this requirement is met. The applicant must, however, meet this requirement
at the time of visa application.
9 FAM 42.33 N7.1 Definitions
(CT:VISA-910; 10-23-2007)
The Department’s interpretation of the term “high school education or its
equivalent” means successful completion of a:
(1) Twelve-year course of elementary and secondary study in the United
States; or
(2) Formal course of elementary and secondary education comparable to
completion of 12 years elementary or secondary education in the United
States. Because a United States high school education is sufficient in itself
to qualify a student to apply for college admission, in order for a foreign
education to be equivalent to a United States education, it should be
sufficient to allow a student to apply for college admission without further
education. Vocational degrees that are not considered a basis for further
academic study will not be considered equivalent to United States high
school education.
The "elementary or secondary education" is key and the college admission bit.
Regarding your work experience, there are several healthcare roles that meet the requirement, and you might be able to align your role with a more favorable role. If you want to describe your role we could advise further...