Hi Ruben, you should go to www.itchyboots.com and get very specific advice from a solo female biker that has covered many African countries. Her Youtube is interesting as well.
Theroadchoseme.com travelled Africa solo in a Jeep. He provides good advice on crossing borders and avoiding payment of bribes.
I expect you will want a Carnet de Passage to make crossing borders with a vehicle easier. https://www.automobile-club.org/tourisme-et-voyages/carnet-de-passages-en-douane
Hope you find yourself...
