It's not worth it. The revelation of Wakanda's isolationism didn't connect to what happened to that Wakanda mission and King T'Chaka's reaction in "Civil War" to me. And what was Nakia doing in Nigeria? What did her actions have to do with Wakanda?
You're misunderstanding what the movie explained. Wakanda stayed unknown until the last few years and T'Chaka revealed the country. But he made sure to make everyone think that Wakanda was this backwater 3rd world country not worth investigating or lots of attention. The point of BP was T'Challa deciding that this was still BS and he unveiled the true power of Wakanda to the world.
Nakia? Whatever she was doing was for protecting Wakanda's status as a fake 3rd world country. Stuff no longer necessary by the end of the film.
My biggest problem with the movie was the last 20 minutes or so. Why? Why didn't T'Challa follow Naka's advice and use Wakanda's technology to help the African diaspora and other African nations?
He's starting to, but he's also willing to start sharing with other major countries to keep them from getting too curious as to what was going on in Africa and provoke any kind of international incidents.
Why did Coogler and Marvel allow Wakanda to share its tech with countries that did not require any real help?
So to avoid international repercussions from them helping their neighboring countries.
Why did Marvel and Ryan Cogler attached this conservative agenda at the end of the film?
Because there's no magic cure and a downside to becoming a true part of the international world is that everything you do will attract attention. So might as well nip that in the bud by making yourself available to all the world instead of helping lesser countries and get the big guys mad at you for not wanting to work with them as well. They want their piece of the pie after all.