Hi This was my experience I don't know if you'll find it helpful. I had Syd when 14 weeks, I was his 2nd home since leaving his breeder. As he was my first bird after many years, initially like you, I thought he was settling in great. I discovered to my cost some weeks later and quite a few bites that I was acting too fast and too loud.
Now if he hesitates to step up or do anything I ask I wait for him and talk to him very quietly. He often takes his time because something is slightly different from what he's used to. I found if my 'look' changed, a new colour top for instance that would really worry him. So for a while I wore the same colour etc until he recognised my voice. Even now there are times when I can see that he is not sure, so I slow right down and give him time to weigh things up before making any moves.
It has worked so far and I think I have a happier more confident bird.