Hello Ubah69, and welcome to WW
Good advice from Katarina and Gaius
I think this is a genuinely tricky issue, because there are very mixed messages: there's definitely an appetite for writing in English from outside the boundaries of the US and UK - one of the major agencies has even opened an office in India to find it. But I remember Roger Morris (who writes as R N Morris) saying on WriteWords that within the space of a week he'd heard one agent saying "I can't sell anything set in Africa" and another agent saying, "What's really selling is anything set in Africa".
Readers do read for the particular interest of a world which they don't know, but they also very much need the story to resonate with their own experience. So I think Gaius is right that one thing to look at is how to broaden the appeal outside an African audience - how the story you're telling, though rooted in your experience, also has a universal appeal. And then when you do approach agents or publishers, you need to make clear both the authenticity of the world you're writing about, but how it appeals beyond that, as a story.
You could have a browse on Amazon or in a big bookshop, to find books which would appeal to the same kind of market, and see how they tackle the same problem: what do the blurbs say? How are they written?
I know that I've had a very good book about life writing recommended to me but for the life of me I can't remember the title. I'll try to find out and post it here.
One small point: this:
isn't a category that the book trade recognises here or (on the whole) in the US. A novel is always fiction.
What you're doing is best described as "life writing" - using the techniques of fiction to tell a true story. Another term might be "narrative non-fiction" or possibly "memoir".