I'd have gotten my GED, left high school early (ideally just avoiding it all together), taken my sweet ass time getting basic prereqs out of the way at community college (instead of trying to finish in 2 years with 6+ classes per day like everyone else), figured out what I wanted to do based on what I'm good at, and then go from there.
If I had done that, I would have become a professional software developer much earlier and have saved tens of thousands of dollars and nearly a decade of my life.
What actually happened was I spent high school learning to hate the system for its prison-like qualities, ended up rushing into an education for something I ended up discovering I didn't like and wasn't good at thanks to typical societal pressures of getting an education and "keeping up with your peers", and eventually I had to start my life from scratch in my mid-20s.
I'm just glad I didn't have to start over in my 30s or 40s.
If I could go back with what I know now, I'd be working full-time by age 19 and earning more than any of my peers, and my self esteem would have been much better by not forcing myself to do a bunch of work I hated in a short period of time for a goal I really had little aptitude or passion for.
Oh, and if we want to talk about education broadly, I would have played a lot less Halo and read more thought-provoking books about useful occult knowledge that no mainstream schools will ever teach. These are what I wish I had been reading by the time I left high school:
- 48 Laws of Power (and pretty much everything by Robert Greene)
- The books "Influence" and "Presuasion" by Robert Cialdini
- The Subtle Art of Not Giving a F** by Mark Manson
- Left of Bang (Van Horne, Riley)
- No One Ever Told Us That (John D. Spooner)
Those books alone provided way more value than my entire high school education (which was really a retread of everything learned in middle school), and I'd have been way ahead had I read them much earlier. I'd have bypassed a lot of strife and wasted time which resulted from believing countless non-truths from the media and elders.