You need packaging. Don’t look like something they will be scared of. Wear nice clothes and nice foreign perfume. Something they can relate to. Have a business card that says you do something important or interesting. Nothing introduces you like a nice glossy business card. Work on reducing that heavy accent.
.. Never ask for favours. That scares them away. Don’t ask for a job or a loan or a lift. As much as they may appear to be in this country to help poor black Nigerians, they do not want needy black friends. Buy your own drinks.
.. While you are doing all this, avoid fellow Nigerians, like cockroaches avoid light.