Tau completed a high-profile transfer from Brighton and Hove Albion to reunite with Pitso Mosimane at Egyptian giants Al Ahly in a three-year deal.
The Witbank-born attacker insists he is delighted at his move, despite perhaps coming as a surprise to fans.
"I am happy, and I feel good about myself," Tau said ahead of Bafana Bafana's opening World Cup qualifier.
"I am proud of myself, but it's been a journey.
"It happens when the transfer window opens, some of us try to utilise the opportunity, and it happened with me that I had to move.
"It's a move that came as a surprise to most, but to me, it was more of playing and game-time.
"Of course, there are other factors behind it, but I won't sit here and disclose every detail of it.
"But I am happy about it, and my family is happy. I know most South Africans are happy because I can now get to play."
So it's been a good three weeks, I think."
South Africa face a trip to Zimbabwe in a Group G 2022 World Cup qualifier on Friday before hosting Ghana on Monday.
Kick-off is at 15:00