How do you buy oil to sell to refineries (futures exchanges)?

willian

New member
Ok long story short ill receive a sum of money in a few months when I turn 18. I will get a little more then 1 million dollars and I want to invest it wisely. How could I buy barrels of oils and sell them? Can you do it online like with stocks by using sites like TD Ameritrade or Etrade?
 
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