Flying in Africa is as dangerous as you let it become. Choose any job offers on merit and learn as much as you can before your commit .. your biggest obstacle will be a work permit and local conversion. We are not all running about in loin cloths eating each other here - but Africa has pilots too and we protect our market jealously
I suggest you start looking in Botswana where there is some openings and invest in some decent ratings before you arrive, as there is not much demand for C150 drivers as fat yanks with Samsonites require C210 or Caravan capacity .. good luck