The central Africans, who were humiliated 5-0 by Zambia in their opener on Sunday, are keen to revive their qualification to the semi-finals with a win over South Africa, who defeated Nigeria 1-0 in their first game.
Wednesday's encounter will be the fifth between both sides at the Awcon, with Nzalang winning three of the last four games.
"First of all, we didn't have time to prepare ourselves for this competition," Okoro said at Tuesday's press conference.
"The match against Zambia was very difficult for us, with some of our players coming here with injuries.
"Our coaches have worked on correcting our mistakes in Monday's training. I know against South Africa, it will be a different game.
"Against South Africa, we will push for a win because we are the second best in Africa after Nigeria. We had a problem with Caf on our players and about 10 of them are not here to help the team.
"We came here with the possible players we think the team can afford just to compete in the tournament. We are going to give our best against South Africa and personally I will also give my best to help my team get a positive result."
Banyana needs a win to boost their semi-final pursuit and vice captain Jane has assured that they would do their best to upstage the two-time winners.
"We won against Nigeria and it was a good feeling for us," Jane said.
"But we need to focus on the other games and prepare for the upcoming match against Equatorial Guinea because Nigeria is not the only team in the tournament. That match is behind us and we have to look forward.
"What is important for me is the team performance. It doesn't matter who scores as long as the team wins but hopefully I will score one or two goals in this tournament."