I'd suggest getting informed, first and foremost.
Africa is an EXTREMELY difficult place to do business.
I can imagine when you go to set up shop in Cameroon, they'll be plenty of outstretched hands needing greasing for the numerous regulatory barriers you'll have to overcome - all of which would be quite doable in North America but massive barriers in Africa. Knowing who is legit and who isn't is everything. Expect the regulatory procedures to be pointlessly DAUNTING.
Go visit the place, start in Douala or Yaounde and ask around. Visit Cameroon's aviation authority (whom I know nothing about but distrust due to their inabilities to resolve the 2008 Kenya Airways crash).
Consider getting a job as a pilot in Cameroon before you go set up shop, just to get a feel for the place. Do you really want to spend your golden years there?
As for looking up controlled airspace, facilities, etc.....that is almost the least of your concerns.
Good luck,
JT