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There is nothing special that I do compared to anyone else. Any knowledge I've gained I learned the hard way. I goofed off in high school and never brought home any books to read or homework, but I still managed to make A's and B's. Went to college and flunked out my Freshman year. I got my Class A commercial license and drove a rig for 5 years. I was having back problems at 22 and decided I'd better get serious and go back to school. I worked full time while getting my a BS in Computer Science (debt free), 13 years after graduating from high school. Found a good job, then kept jumping companies every couple of years until I bumped my salary high enough. All the while living way below my means and socking away and investing as much as I could. I'm now with my current company for 29 years. 22 more months until the company stops contributing to my pension, then I'll switch companies again. I always max the percentage of my salary for the company's matching of the 401k. I can self manage 75% of it, so I do. Always rolled the 401k's from the other companies I worked for into a 401k that I control. Did a lot of reading of the Wall Street Journal and other financial magazines. Any time there is a major dip, I buy more stock. I don't typically day trade unless I see a stock like NVDA that fluctuates from week to week. I invest for the long term and the average age of my investments is around 11 years (the last major dip was 2008, so this explains why I've held these for so long).
In summary, find a career that you can make a decent living at, even if it means going back to school. Jump jobs every couple of years to get your salary increases. Companies aren't loyal, so you shouldn't be either. Live way below your means and save and invest. Also, invest in things that you are familiar with. If you see you and others using a product/service/retailer/etc., research the company, and if you feel comfortable about it, buy their stock. There is nothing wrong with them, but I typically don't buy mutual funds. I just don't see paying someone for managing a fund that for the most part, doesn't do better than an S&P 500 Index ETF.
That's my two cents.