Useful Resources for Making Landscapes in Blender! (Links)
Recommended Course (Affiliated):
Master 3D Environments in Blender
Addons:
Software:
Videos:
RenderRides - How to make an Atmospheric Scene under 10 mins!
The CG Essentials - Creating Landscapes in Blender with the Free ANT Landscapes Addon
Remington Creative - Easy Realistic Terrain (Part 1 - ANY Landscapes)
Martin Klekner - How to Quickly Add Large-Scale Landscape into Blender using World Creator
CG Geek - Create Realistic Grass in Blender 2.8 in 15 Minutes
CG Geek - Create a Realistic Forest in 30 Minutes | Blender 2.8 Tutorial