Not advice for improving your craft, but advice for life:
Move away from Nigeria. I know it's your home but it is a hostile environment for economic success. Heck it's a hostile place to live for a multitude of reasons (of which I am sure you are very familiar with).
When I lived in south america, I went to school with a couple kids who's family worked at the Nigerian embassy. They flat out refused to move back to Nigeria. They spent the vast majority of their effort securing visas to the US. I recommend you do the same (or to South Africa or the EU somewhere).
