Um, you are admitting that you can be scammed. If you don't understand loans, yes, you can be scammed. Don't admit that.
The last new car I bought: I walked into the lot, said I want that one, and took the lowest interest loan for 48 months. I didn't want a 72 month loan. I didn't want an extended warranty. I was done with the sales person in 15 minutes, and done with the finance department in 45 minutes.
It's all in how you manage the situation. If you waffle and flake and can't decide, or don't understand loans or pointless "extras", then you're toast.