The match marks the first of up to 17 for Australia between now next year's tournament, with the opening spot and fast-bowling attack among several big questions for selectors.
He played 42 games for his country between the 2015 and 2019 World Cups, before being dropped just six months out from the 2019 tournament.
"So now 12 months out from one to get my chance to be in the team is an exciting opportunity," Head told reporters in Adelaide. "But it's trying to not put too much pressure on myself to do something different. I have had some really good success at the top. So I don't want to change that and my mindset around that.
"I have played a lot of one-day cricket to know what is expected of me and what is expected to go out and perform. You can't look too far ahead, there is a lot of cricket to come. I just want to start really well on Thursday and play my role as best as I can."
"There is the opportunity to put pressure on in the first 10 overs...and I think that is when I play my best as well," Head said. "But you have to respect the new ball, it's still going to swing.
"I'm lucky I have someone really good [in Warner] at the other end, we feed off each other when we have done it a couple of times [together]."