How Expensive Are Car Warranties?

I really am worried that something is going to go wrong with my car and I won’t be able to afford to fix it. I was thinking that I should buy a new car warranty so that most things would still be covered and I would only have to pay a deductible. Can anyone tell me where I can find some car warranty info? I need to figure out how expensive these are, and what is usually covered so that I can make an informed decision on whether this would make sense for me financially. My car isn’t that old so hopefully not too much is going to go wrong.