It is always wise and advisable to learn before you leap.
"A futures contract is an agreement between two parties – a buyer and a seller – to buy or sell an asset at a specified future date and price. Each futures contract represents a specific amount of a given security or commodity. The most widely traded commodity futures contract, for example, is crude oil, which has a contract unit of 1,000 barrels. Each futures contract of corn, on the other hand, represents 5,000 bushels – or about 127 metric tons of corn"
Source : Investopedia