There are lots of useful tools to learn how to use Business central within "Microsoft Learn" however they are not linked with Business Central Itself.

For example I was wanting to know more on "Sales and Inventory Forecast Setup" there are generic links on the headings that go to this page which offers very little explanation - https://docs.microsoft.com/en-us/dynamics365/business-central/ui-extensions-sales-forecast

However there is a whole 37min training module here... https://docs.microsoft.com/en-us/learn/modules/use-sales-inventory-forecast-extension/ (I only discovered this after posting in a forum)

It would make sense to reference these "Learn" modules within the UI to make things a lot easier for people to gradually take time to complete modules to become more competent using Business Central.