I got used to that with years of use. I don’t know better guides than the official one from Facebook: [https://www.facebook.com/business/learn/how-business-manager-works/guide](https://www.facebook.com/business/learn/how-business-manager-works/guide). The thing is that Facebook updates features frequently so there is very big chance to find a guide or a course that will teach you something outdated.

Suddenly, there is no better way to manage Facebook and Instagram accounts than using Facebook Business Manager. There is no other tool that would give you an opportunity to collect all the accesses in one place (I mean, Ads Manager, IG&FB Pages, Pixel data, Analytics data).