Neither your undergrad major, nor your undergrad college is of particular importance for med school admissions. The first cut for med school applicants is all about your numbers–your GPA, your science GPA (bio, chem, math & physics only) and MCAT score.
You need a high GPA (3.8 was the median last year), a high science GPA (3.7+) , a MCAT score >85th percentile, plus appropriate ECs (community service w. the disadvantaged, clinical volunteering or employment, physician shadowing, leadership positions in your activities, lab bench or clinical research) that demonstrate you meet the [15 core competencies](What Medical Schools are Looking for: Understanding the 15 Core Competencies | Students & Residents) for medical school.
Myos has rather overstated the necessary med school pre-reqs. You need bio w/labs, gen, chem w/labs, ochem w/labs, biochem, physics w/labs, 2 semesters of “college level” mathematics (one of which should be math dept. statistics or biostatistics), 2 semesters of English composition/writing skills, psychology, and sociology. Those are the absolute minimums. There are some medical schools that expect additional coursework in genetics, bio-ethics, human anatomy & physiology. Some even require calc 2 and 3. Once you get through the basic sciences, you can start looking at specific medical schools and see what their requirements are.
Spanish language fluency is highly desirable, but it won’t make up for shortcomings in other areas.
And you will be handicapped should you try to apply to med school during college or immediately upon graduation because you don’t have a US state residency. Most successful med school applicants attend a public medical school in their home state. Because you and your parent(s) live overseas, you won’t be able to establish a state residency unless you live & work (and pay taxes, register to vote, and establish an independent domicile) in one state for 1- 5 years post graduation. (Residency requirements vary by state.) You cannot establish an independent state residency while attending college.