He is still a baby.I taught my grey to wave by picking his foot up and very gently moving it up and down while saying wave,then gave him a little treat. He caught on fast. Try this but be very patiant and keep any trainig sessions very short, 5-10 mins and never ever become frustrated or anxious. Its got to be fun.Reward the slightest move towards your goal, eg if he lifts his foot up even slightly, you can then hold on the treat untill he makes more movement. This will take time. One more thing, Never even think of punishment in any shape or form, only reward good behaviour and ignore bad.Good luck