how to create new project?

[antn9x]

I try to build and create new project but have this error:
antn@antns-Mac-mini cocos % cocos create --project ./my-game
Creating project...
Path: /Users/antn/Documents/cocos/my-game
Type: 3d
✓ Project created successfully!
Next steps:
cd /Users/antn/Documents/cocos/my-game
cocos create --project .
antn@antns-Mac-mini cocos % cd /Users/antn/Documents/cocos/my-game
antn@antns-Mac-mini my-game % cocos create --project .
Creating project...
Path: /Users/antn/Documents/cocos/my-game
Type: 3d
Warning: target path already exists, will try to create inside it.
✗ Failed to create project.

[star-e]

Project cannot be created at existing project directory. You might need to change the target directory.

[antn9x]

✓ Project created successfully! and cannot start, then I follow Next steps: guide.