Australia won the series 2-1 after losing the opening game in Adelaide by seven wickets before winning the remaining two.
“Someone like Rilee (Rossouw) would have taken a lot out of this series,” Duminy said after the match.
“In the one-day format he hasn’t really taken opportunities to score big runs as yet, he will take a lot out of it.
“I think on the whole, the guys who have come in without a lot of international cricket will have got a good feel of what it is about.”
Duminy said the players could not have asked for a better place to rack up international playing experience than in Australia.
“Playing against Australia is always going to be a tough challenge, especially in Australia, so there is a lot of experience that they can gain from this,” he said.
“Hopefully they will take it back to their franchises and up-skill themselves even more.”
It was a disappointing end to Duminy’s first series as captain, however, much pride can be taken from the way the team held on to stretch the deciding match in Sydney on Sunday to the last two balls.
“With the start that we had we set a good platform after being close to 120 after 15 overs,” he said.
“We would have liked to have got to the 180 mark but we fell 20 runs short.
“In an ideal world we would have liked that but to defend as well as we did in that match was a positive.
“We let it leak here and there but I was really happy with the way we fought, we never gave up.”
Duminy said Australia would take some confidence and momentum going into the ODI series starting in Perth on Friday, but the return of the Proteas’ sextet of senior players will be a good morale lift for the squad.
“There are a few guys that have done well for us in this series, they will take a lot of confidence going into the one-day series,” Duminy said.
“The key players come back for us, which will boost the team morale, so I think it will be a good, tough series.”