"To have someone like that who I can learn from will be great for me. I have already trained with Fernando and he has told me that if there is anything I need, I only have to ask.
Ngog said: "I know Henry made a massive impact in England, but I know it will not be easy for me to do the same.
"But I am still young. The French league is very good, they have good defenders there. But in England it is quicker, more intense; it impacts upon you more, physically.
"My qualities are that I am tall and quick, and technically good on the ball, but I still have to adapt to the physical side of the English game. Maybe I can be more aggressive.
"I have spoken to Rafa (Benitez) about how I can progress. He told me how I could learn from some of the other great players who are already here.
"I know I have to work very hard in order to get to the stage where I am playing a lot of games."
He added: "I am really looking forward to wearing the shirt for the first time. It will be a very proud moment for me, and I will try to do my best for this club.