Someone wanted to learn this too, so Grasp built them a personal learning path.
You can keep exploring this one or create a path like this one shaped around you.
Recommended resources
Module 2
Understanding Rights, Licensing, and Fair Use
Module 3
Sourcing Archival Footage: US & UK
Module 4
Sourcing Stock Footage & Photography
Module 5
Sourcing Music & Sound Effects
Module 6
Organizing & Tracking Materials in Premiere Pro
Module 7
Crafting Your Documentary Editing Reel
Module 8
Building Your Professional Brand
Module 9
Finding Documentary Editing Work: US & UK
Module 10