This is always a difficult question to answer because the only one that knows the answer is you. It would depend fully on your flying skill. I have seen people (usually younger kids) that will get their wings in a matter of weeks then the next time I see them they are carving up the skies with some aerobat. Others will get their wings and then struggle to confidently do circuits on a windy day. If you are sure you can handle an aerobatic model then get one. If you are not sure then probably best to wait. If you can, fly a friends aerobatic model then give it a go and see how you handle it.