Well, it sounds like you have a quite interesting task ahead. Did you start with your business model? Regarding startup capital, you can start searching in the crowd funding platforms, like gofundme.com
I advise you to spend some time to investigate the best way to interact in those platforms. Also, I do not know about Nigerian government but any government has star up financing entities, look for it.
Finally, it is a good idea to get a job in a similar business like a shoes factory or shop, so you can get some experience and money while you finish defining your business.
I have started a business plan serie of articles. But it is going to take a while to be finished, some months for sure.
Best of lucks for you!
Let me know if you need any further help with the business strategy.