Thank you all for your advice. I know you mean well but its too late to go back now, I've already told them I'm going to do it.
No, it's not too late. You have to go through questions with the elders. You can just flunk the questions so that the elders say you're not ready yet. Better yet, you can make it known to the elders that you're only getting baptized to please your parents because they're pressuring you. Then the elders will say you're not qualified and you'll be off the hook. Your parents can't blame you if you fail to qualify due to the fact that they are the ones pushing and pressuring you.