Do you have any advice for someone who's a nervous driver?

I suggest finding a friend or a parent's friend to ride along with you and help you almost relearn how to drive. If your parent's didn't teach you that well but you still managed to p your test with little confidence in your skills, you would benefit from having someone that is a confident, able driver give you pointers and advice. The only other thing I would recommend is to practice- you can't get better at something if you don't practice it. And the better you get at driving, the more confidence you'll have.