You can opt IT my dear. There is no such constraints. You will keep learning as you study..
Remember Learning has no age. If you have the interest in codes you will prosper no matter what knowledge you have before that.
I bought my NAO since 1 year and I was planning to go into the direction of Robotic development but now I am working in car industry ( Infotainment & Telematic ). My NAO is completely new and I tested it only once (It will be as if you receive for the first time from Aldebaran).