I quit HS at 15, aced my GED a year later (when I was old enough to take it) and picked up in college until I left to be an entrepreneur and work for myself, so...
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I did almost the exact same thing, but with the California Proficiency Exam. I learned more in community college classes versus my high school friends, it cost almost nothing, got more credits than AP classes, and I didn’t have to waste time on bullshit. I spent the extra time practicing my coding skills.