The Australian has scored only two points through his ninth-place finish in Melbourne, although his qualifying performances compared to team-mate Jean-Eric Vergne have made a good impression.
But despite missing out on a potential Red Bull seat after Mark Webber, whose new deal was announced after the British Grand Prix, was re-signed, Ricciardo admits that he always saw his Toro Rosso seat as at least a two-year plan.
"Unless we were getting some podiums and doing something extraordinary, I never saw that happening next year," Ricciardo told AUTOSPORT when asked about his hopes of moving to Red Bull.
"The thought of it was nice, but I wasn't disappointed because I didn't really expect it. We've still got a bit to learn.
"I'm definitely happy here. I'm not confirmed for what I am doing next year, but I'd be happy to do another year here to improve myself and see what happens."
Ricciardo admits that he does not expect to have a decision from Red Bull on next year until the end of the season.
"It's always very late and since I started with the Red Bull junior team, the earliest news I got was November," said Ricciardo.
"If it comes before that, I would be surprise. Some good results would maybe confirm it a little bit sooner, but I think it will be quite late."