The short three-match Twenty20 series between the two sides will begin tomorrow and Raina said it will be important for them to start the series well.
"We intend to play fearless cricket. The ODI series is the past now and this is a fresh beginning. We have to look to be dominating and be positive in our approach. We will do well. Australia have a young side and they would know that the win in the last game has given us good momentum going into the T20Is. They will come hard at us but we are ready too," Raina said after a practice session here.
The diminutive left-hander emphasised on the need for improved running between the wickets and fielding well at the big Australian grounds.
"I feel we have to try and build pressure by bowling a lot of dot balls. Fielding will be the key here. We have to run really hard in these grounds. The singles and doubles will hold importance. As you saw in the final ODI, MS Dhoni and Manish Pandey ran really well between the wickets which is why the team got over the line. You will have to wait till the end before handing over that finishing blow. It will be important to start well in the first six overs," he said.
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Raina believed the T20 squad has a good mix of youth and experience.
"If you see, the bulk of the 2011 World Cup winning team is present in the current T20 side. There is MS Dhoni, Yuvraj Singh, R Ashwin, Ashish Nehra, Harbhajan Singh, Virat Kohli and myself. There is a perfect combination of youth and experience in the side. We as a unit have travelled together and this dressing room is bubbling with experience and confidence at the moment."
"We have a strong middle-order and an explosive opening pair. If you look at the ODI series, we were scoring 300 in every game. The results didn't go our way but we played very positive cricket. No team has batted as well as we have in this tour which shows the level at which our team graph has improved as a batting unit.
"As a batting unit we do believe that we can play in any situation. When it comes to T20 cricket I would say we will have to plan well before going to the T20 world cup. We have to win these three matches so that a tone has been set for the team going forward.