Futures trading in stock market?

Ok, so I am wanting to learn about futures and how to start trading futures in the market. How do I go about learning how to trade futures and how to know what the market price will be?
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How has options-trading affected the workings of a stock-only market?

Has (Does?) options-trading (futures) affected the stock market? Is there any positive or negative impact of trading options directly or indirectly on the trading of stocks?

Not that I’m not trying to understand what is options trading – I am trying to find out if there has been any study on the impact of futures trading on a stock market on a general scale.