Autodidact here. If one has drive, and a >20Mb internet connection and even a ten year old computer, one can teach oneself Mechanical Drafting, Excel & Access (or other spreadsheet & relational database, like libre office suite).
Here is my advice to any driven young person, like 16 with a car.
get your GED/HiSET
if you are into trades, like the South Park episode showed is gonna be jackin', is apprenticeship.gov
if you are into free college, modernstates.org
if you want to start a business, sba.gov
I went with finishing public HS till 18, instead of jumping out with a GED or HiSET at 16, getting an apprenticeship (mechanical drafting) & doing that put me 2 years behind the ones that did this, and like AI, those are two important years, like the Pink Floyd song, Time...