Hello good people

Any advice on what countries a Nigerian can travel to (visa free) or apply for visa to establish travel history?

I know there are visa free countries but oneslike Barbados require a transit visa from what I gather. We want fool proof visa approval if that's possible. Which countries are reasonably friendly to Nigerians these days?

Trying to help my in law who doesn't have much money and is "only" a teacher but my husband and I are willing to cover her expenses. We also know that her travel history will take time to establish

Please any advice is appreciated