The 21-year-old Argentina international cost Spurs a club-record £30m from Roma in August but has started only five games so far, none of them in the Premier League.
"I think I need a bit of time," said Lamela. "I feel good here, although getting used to life here in every sense is a completely different thing. I've barely been here two months, so time is maybe what I need.
"I need training, a bit of rhythm, some games. English football is very different from the game in Italy - much more physical, whereas Serie A is more tactical.
"It's not necessarily more difficult, but it's just different. This is a style of football I like very much, though, and I think, with the way I play, it will be very suited to my game."
Lamela is convinced he retains the confidence of Spurs boss Andre Villas-Boas and is sure he will get enough game time for him to be considered for next year's World Cup.
"My moment will come and I will make the difference," he said.
"You always train thinking that you're going to play. Sooner or later, my moment will arrive and I have to be ready. That is the way I am looking at it.
"I get on very well with Andre Villas-Boas. He is a great guy who clearly thinks about the future. Because of this, coming to Tottenham is a great step for me and in the future, we'll see why.
"Of course, it's also important for me to get into the Argentina squad for the World Cup, but I'm confident I'll play here. We are involved in four competitions so there are many games ahead."