To take Copilot 3D for a spin, browse to the Copilot 3D website and sign in with your Microsoft account. To get some inspiration, you can view the existing 3D models generated by other people.

Although the built-in Paint app might disappear in the near future, its successor still survives: Paint 3D lets you create both 2D and 3D images, and it's available on the Windows 10 store.