You'll need a 'validation' to fly without an instructor which requires:
1- SA Air Law ground exaam pass
2- flight test - may include nav depending on experience but you'd expect some shake down for rental anyway.
3- A club who WANT to get your validation processed in minimum time.
I can give you advice on 1 and 2, but you really need to gauge enthusiasm from your chosen club about number 3. I got my 'private' validation in under 24 hours at Algoa in PE but I'm afraid a different club (mentioned ealier) first told me "not to bother as validations take about 3 weeks". Well they do take 3 weeks if you want them to! Alernatively they can be pretty quick if the will is there.
Irv