Looks like Hermans is close to you and willing to help give you some one on one advice. Take advantage of his offer, not all of us had the opportunity to learn from someone with experience, and had to figure it out on our own.
But, honestly, it's not really difficult once you get the hang of it. But there are a few things that I would suggest. I'm not familiar with bullet corp molds, but from what I was able to see online they appear to be similar in design to Lee molds, at least for the 6cav molds.
That said, if you're working with a 6 cavity, or even a smaller cavity mold, cutting the sprue can be difficult. And often requires the use of a hardwood mallet to strike the sprue open. Though from the one video I can find of that brand of molds it appears to have a sprue plate handle/lever like the Lees do. So opening with the handle would be the correct way if that is the type of mold you have. With that said, casting also requires a cadence. You want enough speed to keep the mold hot and in the right zone for good fillout, but not so hot that it is smearing lead across the top of the blocks or the sprue plate. You have to determine what casting speed this cadence is, and keep to it for consistent bullets.
I'm unsure if you are using 120v or 240v being in South Africa, but I would get the dial on the Lee Pot will probably affect what setting you need to set it at. In the US we have 120v, and I set mine on about 6.5-7. But whatever you set it at, having a lead thermometer helps. Regardless of whether or not you can get by without one. You'll want the temperature of your melt in the 700F/370C range, sometimes higher. But you shouldn't need to go over 800F/425C. The easiest way to determine all of this is to simply use a proper thermometer. They're not expensive, and will save you some headache. There are more fancy PID solutions with digital readouts, but this is unneeded. I don't use anything like that, and I have all the parts on hand to design one if I chose to. (Electronics is a hobby of mine).
Best advice I could give you, is to watch some videos on Youtube of someone actually casting. There are videos!
Here is a video with a "Lee Style" mold with the sprue handle:
https://www.youtube.com/watch?v=dxpjBAUXAwE
And here is a video showing casting with a typical sprue plate type mold:
https://www.youtube.com/watch?v=Ce4jT-37Fec
Bottom line is this, keep at it. You'll figure it out. It just takes a little practice to figure out what you're doing. The first time I cast the result were not something I was at all proud of. But after another day or two of trying I had good results. And two decades later I'm still at it.