Blender 3D is free and open source 3D software. It can be used for 3D modeling, sculpting, animation, VFX and so much more. But learning to use it all starts with understanding the user interface.
Welcome to the Blender UI
Most of Blender is maintained in a single window that can be subdivided and customized as we desire. The creators of Blender specifically didn’t want it to require multiple open windows on top of each other.
The main components of the Blender user interface are “Workspaces” and “Editors.”