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Advice
You don't have to know everything to begin, just start. When I started, I used electrum wallet to receive payments. Then I got to know about lightning network, which I adopted. I have recently become acquainted with a crypto exchange in Nigeria. I'm considering a deal to create a merchant account with them as a payment gateway.
First and foremost, I want to congratulate you OP for your very inspiring journey! I also find it very amusing that most people from Africa have started adopting BTC as a form of alternative currency in payments of services and products. These types of ventures are what creates a positive image on the view of people on BTC.
In addition, it is actually great that you adopted lightning network to your process as it takes a relatively faster amount of time processing, unlike traditional exchanges. One thing that I struggle with is the amount of confirmation needed in order for payments to be processed in the blockchain. With this alternative, not only does it make it efficient, but it is actually more faster in receiving and sending payments.