It does take time and patience, it's really the only way to get him over the fear.
It's okay, he's young and will be fine. Just continue doing what you are doing, and don't be afraid to push his limits, in other words, when you see he is comfortable with where you are at with him, move on to more.
If there is anything in particular that he seems especially fond of, like a piece of tuna, etc. then use it to your advantage, small bit in your hand, make him come after it, then move your hand to the right for him to eat it and pet his side with your left hand. It's best for petting to start with his side or neck rather than him seeing your hand reach up over his head.
It's okay, he's young and will be fine. Just continue doing what you are doing, and don't be afraid to push his limits, in other words, when you see he is comfortable with where you are at with him, move on to more.
If there is anything in particular that he seems especially fond of, like a piece of tuna, etc. then use it to your advantage, small bit in your hand, make him come after it, then move your hand to the right for him to eat it and pet his side with your left hand. It's best for petting to start with his side or neck rather than him seeing your hand reach up over his head.