Goffins are also my favorite(I have 3) because of their zest for life and how they can always make you laugh.Your baby will get up on your hand from the floor because he is scared and he is already trusting of people.Really, he should have been quarantined from your cockatiel for a month to be on the safe side so that the 'tiel wouldn't pick up any sickness from him. But, since he's already there now, I will pray that he is healthy.Because he flies as soon as you get him up a little higher from the floor, He needs to play what I call"getting to know you" Take him out of the room you have his cage in(make sure you have a t-stand set up in the room you're taking him to)Put him on the t-stand, put your hand to him and give him the up command. When he steps up, tell him what a lovey he is and praise him.MAKE A BIG DEAL OUT OF IT. Then, put him back on the stand and repeat the process. If you can pet him, also give him alot of pets. Only work him 10 or 15 minutes at the most.Then, take him back home praising and loving him all the way. Anytime you want to train him to do anything you always want to take him away from the security of his cage so he will rely on you. As for his fruits and veggies you are probably not cutting them the way they were cut before or their not in the same dish or he has a little attitudey about changing homes. Just keep putting them in in bite size pieces with corn-on-the-cob on top(one of Goffins favs) and eventually he will start to eat them. You may also try to see if he will take it from your hand and eat it. Try to get him on a regular schedule(uncovered the same time every morning,cage cleaned and fresh food same time every day,out time at the same time as well as bed time.)If he is not a biter,when you open the the cage door,present your hand and tell him up. If he doesn't get up,close the door and try again every 15 minutes or so until he gets the idea that that is the only way he's coming out.You want him to know that you are flock leader and that you love him.Good luck and I know you will do fine.