See if there are courses that you have already taken that can be used to aid you in the completion of your nursing lessons. Some classes that you may have taken earlier on may actually count towards your completing of the certification which will save time and money.
Look into online tutorials for your nursing lessons to give you more practice in your studies and to aid you in the understandings of the practices and methods of your courses. See what type of help is available and how much it will cost to use or take advantage of it.