Start small. It's could be in the agricultural sector. Fishery, poultry, livestock or farming(african has fertile soil)
Land, not really fertile but you can fit Europe several times in sub-Saharan Africa so if it all get irrigated and fertilized, then it would be good.
Self-initiative can only go so far though. Why bother improving if the government can just simply take it away from you. Look at what happened to Zimbabwe. Outright drove people who know how to operate farms. And don't tell me it's all about "righting" a wrong, if the government was smart enough, they could have just asked those farmers to slowly pay for the land and then later use that money to buy back some land to give to locals.
Point is, these "leaders" dgaf about the people. I mean, just look at this.
https://www.youtube.com/watch?v=nA_p4--ZFIo