score:2
Just looking at Google Maps (and it looks like itβs difficult to find any decent pictures at water level)
In Nigeria, I feel itβs going to be difficult, most of the country is pretty flat, except mountains to the southeast on the border with Cameroon, but very few lakes over there. The few lakes in the country are dam reservoirs.
In neighbouring Cameroon:
Tanzania and neighbouring countries are probably better options. Lake Malawi for instance could be a candidate in some places (itβs a very large lake). There are quite a few other lakes and mountains around the country (and nearby), this could be a better starting point, though I doubt you would find exactly the same kind of relief found in Alberta.