If you expect to be back in Kenya in 6 months (and you do not intend to return to oz permanently) I would save yourself the hassle and expense of starting all over again on an Australian licence you will never use... and then having to go through the further hassle of converting that licence to use in Kenya.
While 6 months will not be an ideal break early on in your PPL training, it would be a far cheaper and easier prospect to just do some refresher training when you return and then continue on.
Also 6 months is not a huge amount of time do redo the Australian exams, and flight training. It would be fine if you had nothing else to worry about, but you are presumably in oz for work of some sort and if I were you I would spend the time outside of that playing tourist.
What happens if due to factors out of your control (weather/time/aircraft availability) you dont finish in the 6 months? You will merely have two incomplete licences and a reasonable hole in your wallet.