When you open Blender for the first time, you'll encounter the 3D Viewport, Outliner, and Properties Editor.

Area	Description
3D Viewport	Primary workspace to view and manipulate 3D objects.
Outliner	Hierarchical list displaying all scene objects.
Properties Editor	Panels managing materials, modifiers, and renders.
Timeline	Controls animation playback and keyframes.

Click the tabs on the top bar (Layout, Modeling, Sculpting, UV Editing, etc.) to switch your workspace.