Blender Help

Blender is a general-purpose, free and open source 3D package. It is also very popular among VTuber creators.
Blender Help
Setup Blender for Unreal
Setup Blender for working with Unreal
Exporting for Unreal (FBX)
How to export characters from Blender for Unreal
Best Practices for Building Characters
Helpful info for building a character in Blender for Unreal
Differences with Unreal
Extra information about differences between Blender and Unreal