Welcome to POTN dlee975.
Since you are new to POTN I am going to assume, based also on your question, that you are also new to photography so getting the exposure correct is paramount.
There is a circular polarizing filter that will help a lot under the right conditions to bring out more separation between the blue sky and white clouds. However, one should only consider this after having a firm grasp of proper exposure.
When you do decide to go with a CP filter don't be cheap. In fact, do not be cheap on anything you purchase in photography our you'll regret the image quality. You do get what you pay for.
Looking forward to seeing some of your work posted up. We're all here to learn.