If you associate your words with actions your parrot wants or understands he will pick them up much easier. When I want my grey to go on my arm, I say "step up" . Now when she wants me to come get her she says "step up" and raises a foot. If she does something I don't like I say, "stop that". Now if I do something she does not like, she will tell me, "stop that". Be patient, if a parrot is meant to talk it will, if not, they have some many other wonderful actions they are still a joy to have around and love.