I think it depends on your strengths and weaknesses. For example, if your weaknesses are concentrated in one specific area then self study or a tutor might be best for you. However, if your weaknesses are more evenly spread out and you thrive in a classroom setting than a course might be for you. It is important to keep in mind that for a classroom course, you are limited by location.
All i can say that it depends on you how much you take the preparation seriously. If you are going to take the classed then there will be a proper timing or schedule for everything like all required material, stydu time, test etc. Now if you are thinking to do it by yourself then you should be confident that you can manage the discipline and schedule of the study.
