I agree about starting local and expanding from there.
For example, I like the global perspective. Yet it is helpful to pick say three to five locales around the planet, and do deep dives there. Places in the distance can remain thumbnail sketches.
The intention of the world map is for the DM to pick a specific locale somewhere on the planet and make it their own, then flesh it out according to how the table develops it.
I notice the 2024 Forgotten Realms guide will pick five local settings, and seems to be doing deep dives. Probably this will be more helpful.
An other advantage of focusing on local settings, it is easy to plug them into other world settings.
Still, it helps to have a planet in mind.