[cypher]

It sounds as though taming is going ok for such a short time, each hamster is an individual so there's no set time to expect your ham to move on to the next step so don't feel you have to rush things.
If your ham is taking treats while in his nest you could just try holding your hand slightly further away to encourage him to come out a little more.
I'm sure his confidence will increase soon, just be patient, talk to him a lot & go at his pace.