It takes a lot of time for them to get used to you and learn to trust you. If you just got Charlie I would sit by the cage and talk to him, read books to him, hand him treats. Let him get see you aren't a threat.
I am not sure if it is just the angle of the photo but Charlie doesn't seem to have any toys in his cage to play with. Greys should have lots of toys to play with and different kinds of perches like rope, wood and the sand rock kind that looks like a pumice stone (can't remember the name of it right now).
Hope this helps and good luck
Irene