The former St George-Illawarra Dragons star arrived in the UK this week to begin training with his new club, who by their own high standards had a poor 2006.
"I'm definitely not here for the money. I was well-paid back home and could have stayed," said the 29-year-old. "I am quite prepared to be judged by my performances," added the stand-off.
Barrett also said that the decision to move both himself and his family to this country was a big one, but they were gradually getting used to their new surroundings.
"It was a big decision," he said. "I have been with the one club since I was seventeen. It was hard to pack up and move the family over here but it's something I have wanted to do, and I am looking forward to a good season."
"We are settling in. We are having a bit of trouble getting around, but we are getting there," he said. “We are also getting used to the weather which isn't too bad at the moment.
"I have enjoyed the training and it is good to prove yourself to different people again. I have found that already everyone is really helpful.
"The club finished off last season really well and we have to carry that on at the start. If we prepare right I am sure things will go well."
"I am looking forward to striking a combination with Thomas Leuluai, it will take some time but I am sure after a few times we will be right," he said.
"I have goals and ambitions which I will strive to achieve but I will keep those to myself. I will train really hard and settle the family in. If everyone is settled in at home it makes it easy for me."