More than sheer good luck, making online business work has to meet a few vital things when developing your web shop. One very important consideration is to ensure a secured online payment system.
Since paypal is not available in Nigeria here are top payment gateway with very easy magento extension to integrate in your magento site

1) Remita : After registration on remita's website, you can easily download remita magento extension and install. Its accept almost all Nigeria cards

2) Paystack- With a very attractive nice interface, this payment gateway also have a magento extension you can install for free.

3)Voguepay - Also have magento extension. They even gave the latest magento - magento 2 extension for your store

4) GTpay - With $90, you can download and install the popular GTpay on your magento website

5) Custom - If you have your preferred payment gateway but does not have a magento extension, you can get the service of a developer to code a custom extension for your store.

I am a magento certified developer. You can contact me at ilyas.muy@gmail.com.

Hello,
Why is it that one step checkout extension isn't common on most Nigerian ecommerce website