The 34-year-old Australian arrived back in Britain after departing A-League side Melbourne Victory.
Kewell has not played in England since leaving Liverpool in 2008 to join Turkish giants Galatasaray - where he spent two seasons.
He is still best remembered for his eight-year spell at Leeds, before his high-profile free transfer to Anfield.
"If something comes up and it is the right thing for me I will have a look at it," he told Sky Sports. "But I am happy to move on with a different career."
Despite being linked with a host of clubs, Kewell insisted he was yet to receive an offer.
"None at all, it has been difficult when you have been out of the country for a while but that is how it goes in football," he said.