The price of oil has halved in the past few months that's why the rigs are in trouble.
You can still learn skills like programming without schooling.
I do suggest looking into getting educated in basic finance and basic accounting to teach yourself principles of investment, so the good money you make won't be eroded over the years by inflation. (Which basically means, the price of things go up every year, by more than how much interest the bank gives you on your money, so over time your money can buy less and less things.)
One semester of one finance subject and one semester of one accounting subject would probably do.
Net Present Value, Portfolio theory, diversification, and enough accounting to read financial statements from companies listed on the share market.
But don't buy shares for the next few years - I think there will be a crash coming soon enough.