Don't do a major African map too soon
I say this because I'd rather the team do it well and be able to realize it after some practice rather than jumping into it asap
I'd first do a few maps in NA and Eurasia, about 3, before doing anything super ambitious
And I should disclaim that when I say Africa map, I assume it'll be the one we all want with a ton of plains game (especially giraffe and zebra) and the big 5