Well, using a GPS as such an inexperienced driver would not be the best idea, but at the same time it would help you get where you need to go so that you do not get lost. I would suggest using a GPS but only to a certain point. If you feel that you will get lost on your way, then make sure to have one handy. GPS systems can be helpful but can be a hindrance if you pay too much attention to it. The key is knowing how to divide your attention between the road and the system. So I think you need to decide if that is best for you or not. I don't see why it would be a bad idea, but make sure you do not give the system too much of your attention if you use it. Secondly, driving on a major highway is something you will just have to get used to. The only way you will learn how to deal with it, is if you put yourself out there and drive. Reading about how to handle highway situations is a good idea, but at the same time, I suggest you begin driving in highway situations. That is the only way you will become comfortable. Have a parent drive with you, if you are nervous. The more you do it, the more you will be ready for those situations. You learn by doing, not just reading.