i took quite a few of highschool classes while in middle school: earth space science, algebra 1 & 2(my school district used to do this program to take algebra 2 over the summer), geometry.
in highschool, freshman year was i took one AP (world history), and the rest were honors [precalc, english, biology, writing, spanish]
however in the summer, i took Highschool chem. it gave me enough space in sophomore year to do 2 APs (calc 1, european history), honors were (spanish2, english,] and 2 regular [phys Ed, drivers ed/health],
in that summer, i did intro to microbio which counted as an AP bio grade. thus leaving me lots of room for 5AP classes in jr year and it was tough (ap chem, ap english comp, ap calc2, AP american history, ap psychology) and my school offered an honors webdesign class.
senior year was just whatever leftover, the six remaining AP classes: ap stats, ap english lit, ap us governemnt, ap physics, ap human geography, and AP art history. but i think art history, human geo can be taken during any of your 4 years in highschool
i think i took a total of only 3 maybe 4 regulars due to prerequisites that my highschool enforced to all students. drivers ed/health, physed, a writing course, and some intro language class
but dont fret dude if your school doesnt offer that many AP classes. just focus on getting in top 10% of your graduating class, and have a decent SAT or ACT score