It will depend on how aggressive the line it comes from is. They are also very, very social animals so keeping him by himself will probably result in a miserable animal that is even more difficult to tame. Any chance you can get a friend for him?

I have several that I've handled daily since birth and they are about as tame as socialized mice. They'll climb all over me, groom my fingers and ride around on my shoulder but they aren't 'cuddly' like a pet norway rat. They are cute little things though, so good luck.