As a complete beginner with Blender, I have been creating simple 3D models to export as GLB and import into another program. For this purpose there is no animation, no physics, etc. I just need them to be visually correct.
When I export the object, it is always the default white color. I only need relatively flat color (that is, I don't care about textures nor do I want to map a bitmapped material onto the objects for this particular project), but I do want there to be something besides white.
I would appreciate if any answers were very step-by-step from scratch. Most answers I have seen here assume one is already very familiar with the Blender interface, and I am not. For example, one says to "Set the Workbench viewport to Flat-Vertex color." OK, but there's nothing on the screen with the label Workbench. Is that a Workspace? It seems not. The manual is unhelpful. So more specific instructions like, say, "On the right side of the Blender workspace is an icon like a wrench. Actually there are two wrenches sometimes, I mean the light blue one right next to the workspace. Click that and select foo."
I'm using Blender 2.90. Thank you.