Many times new birds are too afraid NOT to put up a fuss and seem to willingly step on to your hand or finger. Then a few days later they realize, hey I can avoid them!
Like illusive said, you have not ruined anything yet. Just be patient, let him be without trying to get him to perch on your hand for a week or so. Just move slowly, stick to changing food/water and cleaning when necessary and talk to him lots and lots. It's alll new and scary to him and he needs time to get used to his new home and all that goes on there
Then begin putting your hand in cage, resting on a perch and just hold it still for 10 mins or so a few times a day. When he is comfortable with your hand just being in cage like that, then slowly move it a little closer to him talking all the while, and again stop and hold still. If he seems nervous and shies away stop where you are and be still for a while. Lesson over for that round and try again later.
It takes time and patience. Every bird is different so there really is no time frame. It's all in individual keet time.