I was assuming he was fishing for a paid marriage to get a visa to Poland (and thence to western Europe)
It's quite telling that all these African and Middle Eastern countries are rapidly and collectively falling apart. I came across some rather interesting articles today which seem interrelated.
One was a Gallup poll that found 700 million migrants would move if they could with the "sun-kissed" areas of the world like Africa, Latin America and the Middle East topping the chart. Naturally their destination targets are North America and Europe where the desire of locals to migrate is among the lowest. Only Asia came dead last when it came to people having any desire to emigrate from and to there.
The other article was about people are at their most violent, uncaring, unhelpful and antisocial in higher temperature climates (obviously a few non-Polish posters on PF claiming to live in Poland disprove this but there are always outliers in any study).
A third article was about how so-called charities in the EU are using their money to pay off human traffickers in the Med to keep the flow of migrants into Europe steady (and obviously their own jobs at the charities secure) since many migrants can't afford the fees being demanded to be smuggled in.
At least the Nigerian OP has the advantage of being part of the Commonwealth. But interestingly he won't take that route. I suppose the UK is so saturated with them now and other migrant groups that the OP knows he wouldn't stand out and the locals there are now all too familiar with their worldwide reputation for scamming people. I imagine North America would be too inconveniently far for the OP to get back home. North America also has its own large scale diversity and again the OP wouldn't stand out. I've often heard that native Africans often look down on their own diaspora in North America and don't want to be associated with them or confused as being part of them.
It's not clear though why the OP and all the other migrant seekers from predominately Muslim countries assume Poland will be a soft touch like the UK, Germany and Sweden have been.
It's also not clear either what these migrants bring to the table. Western economies are undergoing a vast economic transformation. They are all post-industrial and don't need large workforces anymore.
As mentioned charities and the sex industry will always need bodies (literally) but neither of these special interest groups pay tax and they both rely on others in society picking up all the costs especially in the longterm. So 'eff them.
The Nigerian OP should stay at home to make his homeland a better place to live for other Nigerians and migrants looking to move to Nigeria which should be strongly encouraged too for the sake of diversity.
Apart from widespread corruption at every level of society and even a theocratic civil war tearing Nigeria apart there are other serious challenges like overpopulation, pollution, deforestation, soil degradation and desertification. There is so much to do to clean up Nigeria and yet the Nigerian OP wants to simply walk away from his responsibilities back home and live it large off the welfare tit of Europe (and preferably those attached to natural blondes as well of course).
Rather than accepting those fleeing the mess they made of their own societies (save those in actual physical danger and persecution like albino children and white Africans) Poland and the rest of Europe should only accept those who can demonstratively prove by their education, qualifications, and most importantly experience that they have something to contribute. And no, not those that the leftist, BBC-craving, fake news outlets propagandize about when they try to tell the public that illiterate, diseased, talentless teenage and twenty-something third worlders on the TV screens are doctors, lawyers and astrophysicists back in their African and Middle Eastern homelands.
Proving who you are and what you can contribute is the norm today when seeking employment in any Western society and it was the norm for millions of literate and skilled European migrants who went to North America in previous centuries and made those societies surpass even Europe in every known facet in making contributions which benefitted humanity both domestically and internationally.
Makers are needed now and in the future. Not takers.