Taming when the bird just wants the treat

I'm having a bit of a scuffle with my new budgie, I'm trying to train him in things like target training, stepping up, flying to me, etc. I'm using millet to do it and although he is able to do the trick he doesn't do it on command and keeps trying to go to the millet. For example when target training he does bite the end of the stick but the second I pull out the millet he climbs onto it, starts eating it and won't let go. And when I want him to fly to me or step up he won't get on the perch and instead climbs all over me to find where I'm hiding the millet. And when I manage to get him on the perch he flys back to me. I have tried it with other kinds of food but he doesn't really have the motivation for it. What do I do?