Travelling alone in South Africa

Hi,I am leaving for South Africa next Monday and heading up to Pietersburg to work at a Monkey Sanctuary for a couple of weeks. I am around for 2 months and will probably head over to Durban and poss down to cape town. Looking to do some scuba diving and possibly a horse back safari. I haven't planned what to do just going to go with the flow. I am worried about going on my own, so if anyone needs a travelling companion or has any ideas of where to stay and what to do I would be very grateful.