He needs to finish HIghschool first and foremeost.
The one great thing about trades is that you can make a ton of $$$ at one. You are also generallly able to be your own boss and work as you wish.
For trades, you are in a good boat because you earn while you learn the trade. However, most trade labour-markets are becoming saturated with too many workers right now and many cannot find work.
Electrician is the first one that comes to mind.
I would say mechanic would be a good trade to get into. Stay indoors, work on cars, etc..
There are alot of trades that you defenitaly dont want to get into because of working conditions etc.
"I believe that banking institutions are more dangerous to our liberties than standing armies. If the American people ever allow private banks to control the issue of their currency, first by inflation, then by deflation, the banks and corporations that will grow up around the banks will deprive the people of all property until their children wake-up homeless on the continent their fathers conquered."
-Thomas Jefferson 1802