"But it's more excitement than anything. Now that I know that I have proved to myself that I can do it.
"Knowing that if I've got the tools with me that weekend in March, then I've got it all to play for and I honestly believe I can do it."
Ricciardo admits he goes into the Australian GP with far higher pressure than last year.
Red Bull made a shaky start to the first F1 test at Jerez in Spain while Ferrari put in an eye-catching run and Mercedes again proved strong.
But the Australian was quick to make light of the significance of the session.
"Definitely at the first test, you worry about yourself, but of course we're aware of the laps Mercedes did and the lap time Ferrari put down," Ricciardo said.
"We expect nothing less of Mercedes, to be honest, but Ferrari look like they came out pretty strong.
"For now they look good, but it's still early, and Jerez is a place that we don't race at again."