You could put signs on your car proclaiming you're a "New Driver." Some people won't care, but some people will be more understanding. When I was first learning to drive, I drove in an area where there weren't a lot of cars, but the block I drove around took me to one road that had some cars on it. I was driving too slow, and a jack*ss screamed out something offensive to me (he was so loud, I couldn't even understand him!). I was scared, but at the same time, I was thinking, What an a**hole! Don't feel bad, you're not the only one who gets drivers angry at you.