As soon as you are able to balance on your wakeboard then it is advisable to switch to a lighter and smaller wakeboard in order to be able to start trying tricks and turns. If when you are purchasing your first wakeboarding equipment as a beginner you have the fortune of being able to afford two separate wakeboards, then getting a heavier and a lighter one could be a good decision. A final point to consider is that your size and weight will also come into play when you are choosing your wakeboard, and if you are very heavy then a smaller and lighter wakeboard won’t be able to support your weight. Make sure then that your wakeboard is at least wide enough to ensure you can balance on it.
Speaking of weight, ballast or fat sacks are also very important for the beginner when wakeboarding (and are also useful for other water sports such as waterskiing).