The 18-year-old joins Spurs on a two-and-a-half-year deal after impressing the club during a December trial.
The midfielder had been playing non-league football in his homeland after ending his involvement in the Australian national setup to trial in Europe.
"It's a dream come true for me," he told World Game.
"I'm thrilled and I have not stopped pinching myself since Spurs offered me a contract.
"I was once told at the AIS [Australian Institute of Sport] that I was not good enough and here I am on the books of one of the world's greatest clubs training with some of my heroes.
"I would like to thank ... my junior coach John and above all my father Salvatore for all he's done for me and without whom I would not be where I am today."
The midfielder indicated that his new club may look to move him from his natural role into a defensive berth.
"Spurs said they see me as a central defender or holding midfielder," he said.
"We are the reserves side so we have to be ready to step into the first team whenever we are needed."