Options questions

Good day to the fellow traders. I am starting off new in the day trading. I’m a newbie. My question is about doing a call, say SPY for example. Am I buying the contract that is say $5.57 for a share and selling it when SPY hits a certain point or am I paying for the entire SPY which is say $501?

Apologies for any confusion. Hope this makes any sense. Just new to all this. Been also watching videos and joined a discord server regarding this but want yall inputs.