Lewis’ side bounced back from their T20 World Cup disappointment with a dominant multi-format series win in South Africa.
The Women’s Ashes begins on January 11 with three ODIs, followed by three T20s and a single Test match at the Melbourne Cricket Ground on January 30.
Lewis said: “We’ve come off the back of a really successful tour of South Africa, which gave us some really nice preparation.
“We’re in a really good place. We spent a lot of time reflecting on what happened at the World Cup and we’re in a better place now than when we got on the plane to South Africa.
“It’s a tough, tough challenge. Is it the hardest challenge? Yes, probably, just about.
“Winning a 50-over World Cup in India is a big challenge as well, so 2025 is a huge year for us. We’ve got two very different challenges that we’re really looking forward to.”
Heather Knight’s side are bidding to win the Ashes for the first time in 10 years, with Australia retaining in a thrilling drawn series in England in 2023.
Australia have also bounced back from T20 World Cup disappointment – they lost to South Africa in the semi-finals – by beating India 3-0 in their one-day international series.
Lewis added: “Their record has to be respected and as a team they have to be respected and we are really aware of how hard the challenge will be to go and play our best cricket in Australia.
“I suppose the thing we’ll focus on rather than on the opposition will be ourselves and how we want to play.
“If we play our best cricket it will be a competitive series and I hope everyone gets thoroughly entertained like they did a couple of years ago in England.
“We’re pretty confident but we also understand what a huge challenge of playing against Australia is for any team.”
England have named four potential Ashes debutants in their squad.
All-rounder Freya Kemp and spinner Linsey Smith are both named in the T20 squad, with wicketkeeper Bess Heath included in the T20 and Test squads as the trio compete to make their Ashes debuts.
Seamer Ryana MacDonald-Gay is also included in the Test squad after impressing on debut in the recent tour of South Africa.
Nat Sciver-Brunt is set to be the key figure for England in their pursuit of the Ashes, after a superb year which culminated in her hitting the fastest century in women’s Tests against South Africa, from just 96 balls.
Australia have made a winning start to the Women's Ashes by beating England by four wickets in the opening one-day international i
By SANCHEZ MANNING FOR THE MAIL ON SUNDAY Published: 01:50 GMT, 12 January 2025 | Updated: 02:23 GMT, 12 January 2025
Key eventsShow key events onlyPlease turn on JavaScript to use this featureEngland looked a little sleepy out there with the bat. Heather Knight the top-scorer
The Australian women's team is gearing up for a thrilling ride to host their arch-rivals England for the long Ashes Series, startin