@Nathan Smith if your goal is to make money in investing, I wouldn’t go spend money on college since it won’t help you really and will waste unnecessary spending. What you need to focus on now is building money making skills and income. The more you have the more you can invest. I would try to live at home with my parents for a while but work my *** off to build up cash to go buy my first house hack. This means buy a Duplex or Triplex, live in one of the units, and rent the others out to where the other tenants rent covers the payment or most of it so you have very little living expenses. Then build the next step and so on.
Read books like Rich Dad Poor Dad, all BP books, consume podcasts on investing stories like BP, go to meat ups and get involved in people near you that are investors. Maybe work for them and learn or get a job like Loan Officer or Real Estate license to make an income that also gets you in the field so you can make money towards investments and build your own business. The possibilities are endless.
I wouldn't recommend joining the military if your reason is just to use the benefits for college or VA loan. You risk your life and mental health when you join. If that's what you want to do because you have a passion to serve your country and you're willing to die for it then by all means you've got my respect but do it for more than saving money on some things when you can use strategies now without that to accomplish your goals. I come from a military family and I am in a paramilitary Law Enforcement agency, it's not exactly what you might think.
College is only worth it if you have a passion to be in the STEM fields like Engineering and want to be a W2 employee working for someone else. I suggest you read Cashflow Quadrant by Robert Kiyosaki.
Good luck! You’re very young and if you get started now and stick to it you’ll be very successful. You have time on your side.