Two months is nothing. It's going to take time and patience and moving at his own pace to get him to accept you. It won't happen overnight and it's certainly not going to happen this quickly. Keep doing what you are doing. Try offering a closed fist or open palm instead of your fingers. Birds are scarred of fingers more than anything else. Keep offering the treats. Try target training with a clicker to see if you can get him to use a stick for going back to bed so he doesn't associate your hands with that. Try not to towel him if possible, because this is breaking his trust and setting you back every time you do it. I found that if I got the bird on my hand, then placed my other hand over the bird's back, it couldn't fly away and would go back in the cage. You may get nipped a couple times but DON'T REACT!! If you don't react when he nips you he will eventually stop nipping because it's not getting him what he wants. Remember that training has to go at the bird's pace, not yours and the toweling is not helping you one bit.