Speaking ahead of Sunday's (AEST) trip to London to face Crystal Palace, the Socceroos midfielder is savouring the realisation of a long-cherished dream.
"It's something I've worked towards for a lot years," said the 26 year old, signed for a club record $13 million by the Terriers off the back of last season's standout loan spell from Manchester City.
"I'm not sure what exactly to expect, if I was I'd be playing there already.
"Lots of people said before I went to England my game wouldn't suit the Championship ... it would be too rough and too hard.
"But it worked out well, so (regarding the Premier League), I don't know. I will just have to play there and see.
"It's an important year for me and I just want to make the most of it.
"It's obviously going to be a step up from last year but we're working hard on our game and we're going to make sure we have no regrets.
"We've got a lot of new signings and they all bring different qualities ... the squad is definitely stronger than last season."
And it will need to be with the Terriers, who won promotion via the play-offs, heavily tipped to return from where they came as they enter the Premier League cauldron for the first tine in their history.
"We know it's not going to be easy but nobody backed us last year and no one's backing us this year, so hopefully we can prove a few people wrong," added Mooy.
Despite fevered speculation where Mooy might move to when City revealed their willingness to sell him at the end of last season, he said the choice to remain at the John Smith's Stadium was an easy one.
"I felt part of something last season," said the former Melbourne City man.
"Moving clubs every year is not nice ... you have to start all over again.
"Me staying at Huddersfield does make it an easy transition for me.
"I know the coach (David Wagner) and he knows me, I know most of the players and the staff, and they know me.
"Everything is easier and smoother. I really enjoyed last year and I wanted to build on that."
Mooy is adamant the key to survival will be the Terriers' home form, with their raucous and rowdy fans having a vital role in that.
"They make a huge difference for us ... the noise they make makes opponents uneasy," he said.
"They drive us on and create a great atmosphere.
"We are are going to need to take the majority of our points at home, so the fans can be a big advantage."