Wow, I am surprised that you think your interest in satellites isn't worthwhile. Satellites make the world go round at this point - maybe not the tv dishes, but it seems like your interest in that would translate to other satellite uses? Mobile phones? Weird military stuff that uses satellites and pays really well?

Do you have hackerspace there? It looks like there are a few: South Africa - HackerspaceWiki

I think you would meet people like you at something like that, at least people who might share your interest in the satellite stuff.

I googled for Autism/Asperger support groups in SA and saw a few - not sure if they are current or near you, but maybe it is worth checking out?

The Coca Cola habit is hard - I also have a problem drinking too much of it. I switched to diet, but the real problem for me is my teeth -- the citric acid in soda eats away at your teeth. My dentist told me to switch to coffee for the caffeine. Espresso is a good substitute-- I still drink soda, but probably less than I would otherwise. And even when I just have coffee, I still crave the soda, so I wonder what they put in it??