The Germany striker struck the only goal of the day as Newcastle defeated Wolves on Saturday.
He said afterwards: "I was a bit nervous before the game, but when the game starts, you concentrate on the pitch.
"You just play football and don't think about it much."
On scoring at St James' Park, Woltemade added: "It felt amazing, just all the fans, everybody was happy, I was happy.
"Of course, right now, if you've won the game, that's more important also. I'm very happy about it."
He also stated: "I have to adapt to this league, I was cramping a bit so I said maybe it is better I went out then.
"I want to give a good spirit, and if I feel I can't give the energy anymore, maybe it is better to take me off.
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"It is faster and the duels are more intense; the Premier League is the highest for intensity, so I keep working on it."